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St. Thomas Aquinas
Summa Theologica

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  • FIRST PART (FP: QQ 1-119)
      • Aquin.: SMT FP Q[14] Out. Para. 1/2 - OF GOD'S KNOWLEDGE (SIXTEEN ARTICLES)
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Aquin.: SMT FP Q[14] Out. Para. 1/2 - OF GOD'S KNOWLEDGE (SIXTEEN ARTICLES)

Having considered what belongs to the divine substance, we have now to
treat of God's operation. And since one kind of operation is immanent,
and another kind of operation proceeds to the exterior effect, we treat
first of knowledge and of will (for understanding abides in the
intelligent agent, and will is in the one who wills); and afterwards of
the power of God, the principle of the divine operation as proceeding to
the exterior effect. Now because to understand is a kind of life, after
treating of the divine knowledge, we consider truth and falsehood.
Further, as everything known is in the knower, and the types of things as
existing in the knowledge of God are called ideas, to the consideration
of knowledge will be added the treatment of ideas.

Aquin.: SMT FP Q[14] Out. Para. 2/2

Concerning knowledge, there are sixteen points for inquiry:

(1) Whether there is knowledge in God?

(2) Whether God understands Himself?

(3) Whether He comprehends Himself?

(4) Whether His understanding is His substance?

(5) Whether He understands other things besides Himself?

(6) Whether He has a proper knowledge of them?

(7) Whether the knowledge of God is discursive?

(8) Whether the knowledge of God is the cause of things?

(9) Whether God has knowledge of non-existing things?

(10) Whether He has knowledge of evil?

(11) Whether He has knowledge of individual things?

(12) Whether He knows the infinite?

(13) Whether He knows future contingent things?

(14) Whether He knows enunciable things?

(15) Whether the knowledge of God is variable?

(16) Whether God has speculative or practical knowledge of things?


Aquin.: SMT FP Q[14] A[1] Thes. Para. 1/1

Whether there is knowledge [*Scientia]?

Aquin.: SMT FP Q[14] A[1] Obj. 1 Para. 1/1

OBJ 1: It seems that in God there is not knowledge. For knowledge is a
habit; and habit does not belong to God, since it is the mean between
potentiality and act. Therefore knowledge is not in God.

Aquin.: SMT FP Q[14] A[1] Obj. 2 Para. 1/1

OBJ 2: Further, since science is about conclusions, it is a kind of
knowledge caused by something else which is the knowledge of principles.
But nothing is caused in God; therefore science is not in God.

Aquin.: SMT FP Q[14] A[1] Obj. 3 Para. 1/1

OBJ 3: Further, all knowledge is universal, or particular. But in God
there is no universal or particular (Q[3], A[5]). Therefore in God there
is not knowledge.

Aquin.: SMT FP Q[14] A[1] OTC Para. 1/1

On the contrary, The Apostle says, "O the depth of the riches of the
wisdom and of the knowledge of God" (Rm. 11:33).
Aquin.: SMT FP Q[14] A[1] Body Para. 1/1

I answer that, In God there exists the most perfect knowledge. To prove
this, we must note that intelligent beings are distinguished from
non-intelligent beings in that the latter possess only their own form;
whereas the intelligent being is naturally adapted to have also the form
of some other thing; for the idea of the thing known is in the knower.
Hence it is manifest that the nature of a non-intelligent being is more
contracted and limited; whereas the nature of intelligent beings has a
greater amplitude and extension; therefore the Philosopher says (De Anima
iii) that "the soul is in a sense all things." Now the contraction of
the form comes from the matter. Hence, as we have said above (Q[7], A[1])
forms according as they are the more immaterial, approach more nearly to
a kind of infinity. Therefore it is clear that the immateriality of a
thing is the reason why it is cognitive; and according to the mode of
immateriality is the mode of knowledge. Hence it is said in De Anima ii
that plants do not know, because they are wholly material. But sense is
cognitive because it can receive images free from matter, and the
intellect is still further cognitive, because it is more separated from
matter and unmixed, as said in De Anima iii. Since therefore God is in
the highest degree of immateriality as stated above (Q[7], A[1]), it
follows that He occupies the highest place in knowledge.

Aquin.: SMT FP Q[14] A[1] R.O. 1 Para. 1/1

Reply OBJ 1: Because perfections flowing from God to creatures exist in
a higher state in God Himself (Q[4], A[2]), whenever a name taken from
any created perfection is attributed to God, it must be separated in its
signification from anything that belongs to that imperfect mode proper to
creatures. Hence knowledge is not a quality of God, nor a habit; but
substance and pure act.

Aquin.: SMT FP Q[14] A[1] R.O. 2 Para. 1/1

Reply OBJ 2: Whatever is divided and multiplied in creatures exists in
God simply and unitedly (Q[13], A[4]). Now man has different kinds of
knowledge, according to the different objects of His knowledge. He has
"intelligence" as regards the knowledge of principles; he has "science"
as regards knowledge of conclusions; he has "wisdom," according as he
knows the highest cause; he has "counsel" or "prudence," according as he
knows what is to be done. But God knows all these by one simple act of
knowledge, as will be shown (A[7]). Hence the simple knowledge of God can
be named by all these names; in such a way, however, that there must be
removed from each of them, so far as they enter into divine predication,
everything that savors of imperfection; and everything that expresses
perfection is to be retained in them. Hence it is said, "With Him is
wisdom and strength, He hath counsel and understanding" (Job 12:13).

Aquin.: SMT FP Q[14] A[1] R.O. 3 Para. 1/1

Reply OBJ 3: Knowledge is according to the mode of the one who knows;
for the thing known is in the knower according to the mode of the knower.
Now since the mode of the divine essence is higher than that of
creatures, divine knowledge does not exist in God after the mode of
created knowledge, so as to be universal or particular, or habitual, or
potential, or existing according to any such mode.


Aquin.: SMT FP Q[14] A[2] Thes. Para. 1/1

Whether God understands Himself?

Aquin.: SMT FP Q[14] A[2] Obj. 1 Para. 1/1

OBJ 1: It seems that God does not understand Himself. For it is said by
the Philosopher (De Causis), "Every knower who knows his own essence,
returns completely to his own essence." But God does not go out from His
own essence, nor is He moved at all; thus He cannot return to His own
essence. Therefore He does not know His own essence.

Aquin.: SMT FP Q[14] A[2] Obj. 2 Para. 1/1

OBJ 2: Further, to understand is a kind of passion and movement, as the
Philosopher says (De Anima iii); and knowledge also is a kind of
assimilation to the object known; and the thing known is the perfection
of the knower. But nothing is moved, or suffers, or is made perfect by
itself, "nor," as Hilary says (De Trin. iii), "is a thing its own
likeness." Therefore God does not understand Himself.

Aquin.: SMT FP Q[14] A[2] Obj. 3 Para. 1/1

OBJ 3: Further, we are like to God chiefly in our intellect, because we
are the image of God in our mind, as Augustine says (Gen. ad lit. vi).
But our intellect understands itself, only as it understands other
things, as is said in De Anima iii. Therefore God understands Himself
only so far perchance as He understands other things.

Aquin.: SMT FP Q[14] A[2] OTC Para. 1/1

On the contrary, It is written: "The things that are of God no man
knoweth, but the Spirit of God" (1 Cor. 2:11).

Aquin.: SMT FP Q[14] A[2] Body Para. 1/2

I answer that, God understands Himself through Himself. In proof whereof
it must be known that although in operations which pass to an external
effect, the object of the operation, which is taken as the term, exists
outside the operator; nevertheless in operations that remain in the
operator, the object signified as the term of operation, resides in the
operator; and accordingly as it is in the operator, the operation is
actual. Hence the Philosopher says (De Anima iii) that "the sensible in
act is sense in act, and the intelligible in act is intellect in act."
For the reason why we actually feel or know a thing is because our
intellect or sense is actually informed by the sensible or intelligible
species. And because of this only, it follows that sense or intellect is
distinct from the sensible or intelligible object, since both are in
potentiality.

Aquin.: SMT FP Q[14] A[2] Body Para. 2/2

Since therefore God has nothing in Him of potentiality, but is pure act,
His intellect and its object are altogether the same; so that He neither
is without the intelligible species, as is the case with our intellect
when it understands potentially; nor does the intelligible species differ
from the substance of the divine intellect, as it differs in our
intellect when it understands actually; but the intelligible species
itself is the divine intellect itself, and thus God understands Himself
through Himself.
Aquin.: SMT FP Q[14] A[2] R.O. 1 Para. 1/1

Reply OBJ 1: Return to its own essence means only that a thing subsists
in itself. Inasmuch as the form perfects the matter by giving it
existence, it is in a certain way diffused in it; and it returns to
itself inasmuch as it has existence in itself. Therefore those cognitive
faculties which are not subsisting, but are the acts of organs, do not
know themselves, as in the case of each of the senses; whereas those
cognitive faculties which are subsisting, know themselves; hence it is
said in De Causis that, "whoever knows his essence returns to it." Now it
supremely belongs to God to be self-subsisting. Hence according to this
mode of speaking, He supremely returns to His own essence, and knows
Himself.

Aquin.: SMT FP Q[14] A[2] R.O. 2 Para. 1/1

Reply OBJ 2: Movement and passion are taken equivocally, according as to
understand is described as a kind of movement or passion, as stated in De
Anima iii. For to understand is not a movement that is an act of
something imperfect passing from one to another, but it is an act,
existing in the agent itself, of something perfect. Likewise that the
intellect is perfected by the intelligible object, i.e. is assimilated to
it, this belongs to an intellect which is sometimes in potentiality;
because the fact of its being in a state of potentiality makes it differ
from the intelligible object and assimilates it thereto through the
intelligible species, which is the likeness of the thing understood, and
makes it to be perfected thereby, as potentiality is perfected by act. On
the other hand, the divine intellect, which is no way in potentiality, is not perfected by the intelligible object, nor is it assimilated thereto,
but is its own perfection, and its own intelligible object.

Aquin.: SMT FP Q[14] A[2] R.O. 3 Para. 1/1

Reply OBJ 3: Existence in nature does not belong to primary matter,
which is a potentiality, unless it is reduced to act by a form. Now our
passive intellect has the same relation to intelligible objects as
primary matter has to natural things; for it is in potentiality as
regards intelligible objects, just as primary matter is to natural
things. Hence our passive intellect can be exercised concerning
intelligible objects only so far as it is perfected by the intelligible
species of something; and in that way it understands itself by an
intelligible species, as it understands other things: for it is manifest
that by knowing the intelligible object it understands also its own act
of understanding, and by this act knows the intellectual faculty. But God
is a pure act in the order of existence, as also in the order of
intelligible objects; therefore He understands Himself through Himself.


Aquin.: SMT FP Q[14] A[3] Thes. Para. 1/1

Whether God comprehends Himself?

Aquin.: SMT FP Q[14] A[3] Obj. 1 Para. 1/1

OBJ 1: It seems that God does not comprehend Himself. For Augustine says
(Octog. Tri. Quaest. xv), that "whatever comprehends itself is finite as
regards itself." But God is in all ways infinite. Therefore He does not
comprehend Himself.

Aquin.: SMT FP Q[14] A[3] Obj. 2 Para. 1/1

OBJ 2: If it is said that God is infinite to us, and finite to Himself,
it can be urged to the contrary, that everything in God is truer than it
is in us. If therefore God is finite to Himself, but infinite to us, then
God is more truly finite than infinite; which is against what was laid
down above (Q[7], A[1]). Therefore God does not comprehend Himself.

Aquin.: SMT FP Q[14] A[3] OTC Para. 1/1

On the contrary, Augustine says (Octog. Tri. Quaest. xv), that
"Everything that understands itself, comprehends itself." But God
understands Himself. Therefore He comprehends Himself.

Aquin.: SMT FP Q[14] A[3] Body Para. 1/1

I answer that, God perfectly comprehends Himself, as can be thus proved.
A thing is said to be comprehended when the end of the knowledge of it
is attained, and this is accomplished when it is known as perfectly as it
is knowable; as, for instance, a demonstrable proposition is comprehended
when known by demonstration, not, however, when it is known by some
probable reason. Now it is manifest that God knows Himself as perfectly
as He is perfectly knowable. For everything is knowable according to the
mode of its own actuality; since a thing is not known according as it is
in potentiality, but in so far as it is in actuality, as said in Metaph.
ix. Now the power of God in knowing is as great as His actuality in
existing; because it is from the fact that He is in act and free from all
matter and potentiality, that God is cognitive, as shown above (AA[1],2).
Whence it is manifest that He knows Himself as much as He is knowable;
and for that reason He perfectly comprehends Himself.

Aquin.: SMT FP Q[14] A[3] R.O. 1 Para. 1/1

Reply OBJ 1: The strict meaning of "comprehension" signifies that one
thing holds and includes another; and in this sense everything
comprehended is finite, as also is everything included in another. But
God is not said to be comprehended by Himself in this sense, as if His
intellect were a faculty apart from Himself, and as if it held and
included Himself; for these modes of speaking are to be taken by way of
negation. But as God is said to be in Himself, forasmuch as He is not
contained by anything outside of Himself; so He is said to be
comprehended by Himself, forasmuch as nothing in Himself is hidden from
Himself. For Augustine says (De Vid. Deum. ep. cxii), "The whole is
comprehended when seen, if it is seen in such a way that nothing of it is
hidden from the seer."

Aquin.: SMT FP Q[14] A[3] R.O. 2 Para. 1/1

Reply OBJ 2: When it is said, "God is finite to Himself," this is to be
understood according to a certain similitude of proportion, because He
has the same relation in not exceeding His intellect, as anything finite
has in not exceeding finite intellect. But God is not to be called finite
to Himself in this sense, as if He understood Himself to be something
finite.


Aquin.: SMT FP Q[14] A[4] Thes. Para. 1/1

Whether the act of God's intellect is His substance?

Aquin.: SMT FP Q[14] A[4] Obj. 1 Para. 1/1

OBJ 1: It seems that the act of God's intellect is not His substance.
For to understand is an operation. But an operation signifies something
proceeding from the operator. Therefore the act of God's intellect is not
His substance.

Aquin.: SMT FP Q[14] A[4] Obj. 2 Para. 1/1

OBJ 2: Further, to understand one's act of understanding, is to
understand something that is neither great nor chiefly understood, and
but secondary and accessory. If therefore God be his own act of
understanding, His act of understanding will be as when we understand our
act of understanding: and thus God's act of understanding will not be
something great.

Aquin.: SMT FP Q[14] A[4] Obj. 3 Para. 1/1

OBJ 3: Further, every act of understanding means understanding
something. When therefore God understands Himself, if He Himself is not
distinct from this act of understanding, He understands that He
understands Himself; and so on to infinity. Therefore the act of God's
intellect is not His substance.

Aquin.: SMT FP Q[14] A[4] OTC Para. 1/1

On the contrary, Augustine says (De Trin. vii), "In God to be is the
same as to be wise." But to be wise is the same thing as to understand.
Therefore in God to be is the same thing as to understand. But God's
existence is His substance, as shown above (Q[3], A[4]). Therefore the
act of God's intellect is His substance.

Aquin.: SMT FP Q[14] A[4] Body Para. 1/2

I answer that, It must be said that the act of God's intellect is His
substance. For if His act of understanding were other than His substance,
then something else, as the Philosopher says (Metaph. xii), would be the
act and perfection of the divine substance, to which the divine substance
would be related, as potentiality is to act, which is altogether
impossible; because the act of understanding is the perfection and act of
the one understanding. Let us now consider how this is. As was laid down
above (A[2]), to understand is not an act passing to anything extrinsic;
for it remains in the operator as his own act and perfection; as
existence is the perfection of the one existing: just as existence
follows on the form, so in like manner to understand follows on the
intelligible species. Now in God there is no form which is something
other than His existence, as shown above (Q[3]). Hence as His essence
itself is also His intelligible species, it necessarily follows that His
act of understanding must be His essence and His existence.

Aquin.: SMT FP Q[14] A[4] Body Para. 2/2

Thus it follows from all the foregoing that in God, intellect, and the
object understood, and the intelligible species, and His act of
understanding are entirely one and the same. Hence when God is said to be
understanding, no kind of multiplicity is attached to His substance.

Aquin.: SMT FP Q[14] A[4] R.O. 1 Para. 1/1

Reply OBJ 1: To understand is not an operation proceeding out of the
operator, but remaining in him.

Aquin.: SMT FP Q[14] A[4] R.O. 2 Para. 1/2

Reply OBJ 2: When that act of understanding which is not subsistent is
understood, something not great is understood; as when we understand our
act of understanding; and so this cannot be likened to the act of the
divine understanding which is subsistent.

Aquin.: SMT FP Q[14] A[4] R.O. 2 Para. 2/2

Thus appears the Reply to the Third Objection. For the act of divine
understanding subsists in itself, and belongs to its very self and is not
another's; hence it need not proceed to infinity.


Aquin.: SMT FP Q[14] A[5] Thes. Para. 1/1

Whether God knows things other than Himself?

Aquin.: SMT FP Q[14] A[5] Obj. 1 Para. 1/1

OBJ 1: It seems that God does not know things besides Himself. For all
other things but God are outside of God. But Augustine says (Octog. Tri.
Quaest. qu. xlvi) that "God does not behold anything out of Himself."
Therefore He does not know things other than Himself.

Aquin.: SMT FP Q[14] A[5] Obj. 2 Para. 1/1

OBJ 2: Further, the object understood is the perfection of the one who
understands. If therefore God understands other things besides Himself,
something else will be the perfection of God, and will be nobler than He;
which is impossible.

Aquin.: SMT FP Q[14] A[5] Obj. 3 Para. 1/1

OBJ 3: Further, the act of understanding is specified by the
intelligible object, as is every other act from its own object. Hence the
intellectual act is so much the nobler, the nobler the object understood.
But God is His own intellectual act. If therefore God understands
anything other than Himself, then God Himself is specified by something
else than Himself; which cannot be. Therefore He does not understand
things other than Himself.

Aquin.: SMT FP Q[14] A[5] OTC Para. 1/1

On the contrary, It is written: "All things are naked and open to His
eyes" (Heb. 4:13).

Aquin.: SMT FP Q[14] A[5] Body Para. 1/3

I answer that, God necessarily knows things other than Himself. For it
is manifest that He perfectly understands Himself; otherwise His
existence would not be perfect, since His existence is His act of
understanding. Now if anything is perfectly known, it follows of
necessity that its power is perfectly known. But the power of anything
can be perfectly known only by knowing to what its power extends. Since
therefore the divine power extends to other things by the very fact that
it is the first effective cause of all things, as is clear from the
aforesaid (Q[2], A[3]), God must necessarily know things other than
Himself. And this appears still more plainly if we add that the every
existence of the first effective cause - viz. God - is His own act of
understanding. Hence whatever effects pre-exist in God, as in the first
cause, must be in His act of understanding, and all things must be in Him
according to an intelligible mode: for everything which is in another, is
in it according to the mode of that in which it is.

Aquin.: SMT FP Q[14] A[5] Body Para. 2/3

Now in order to know how God knows things other than Himself, we must
consider that a thing is known in two ways: in itself, and in another. A
thing is known in itself when it is known by the proper species adequate
to the knowable object; as when the eye sees a man through the image of a
man. A thing is seen in another through the image of that which contains
it; as when a part is seen in the whole by the image of the whole; or
when a man is seen in a mirror by the image in the mirror, or by any
other mode by which one thing is seen in another.

Aquin.: SMT FP Q[14] A[5] Body Para. 3/3

So we say that God sees Himself in Himself, because He sees Himself
through His essence; and He sees other things not in themselves, but in
Himself; inasmuch as His essence contains the similitude of things other
than Himself.

Aquin.: SMT FP Q[14] A[5] R.O. 1 Para. 1/1

Reply OBJ 1: The passage of Augustine in which it is said that God "sees
nothing outside Himself" is not to be taken in such a way, as if God saw
nothing outside Himself, but in the sense that what is outside Himself He
does not see except in Himself, as above explained.

Aquin.: SMT FP Q[14] A[5] R.O. 2 Para. 1/1

Reply OBJ 2: The object understood is a perfection of the one
understanding not by its substance, but by its image, according to which
it is in the intellect, as its form and perfection, as is said in De
Anima iii. For "a stone is not in the soul, but its image." Now those
things which are other than God are understood by God, inasmuch as the
essence of God contains their images as above explained; hence it does not follow that there is any perfection in the divine intellect other
than the divine essence.

Aquin.: SMT FP Q[14] A[5] R.O. 3 Para. 1/1

Reply OBJ 3: The intellectual act is not specified by what is understood
in another, but by the principal object understood in which other things
are understood. For the intellectual act is specified by its object,
inasmuch as the intelligible form is the principle of the intellectual
operation: since every operation is specified by the form which is its
principle of operation; as heating by heat. Hence the intellectual
operation is specified by that intelligible form which makes the
intellect in act. And this is the image of the principal thing
understood, which in God is nothing but His own essence in which all
images of things are comprehended. Hence it does not follow that the
divine intellectual act, or rather God Himself, is specified by anything
else than the divine essence itself.


Aquin.: SMT FP Q[14] A[6] Thes. Para. 1/1

Whether God knows things other than Himself by proper knowledge?

Aquin.: SMT FP Q[14] A[6] Obj. 1 Para. 1/1

OBJ 1: It seems that God does not know things other than Himself by
proper knowledge. For, as was shown (A[5]), God knows things other than
Himself, according as they are in Himself. But other things are in Him as
in their common and universal cause, and are known by God as in their
first and universal cause. This is to know them by general, and not by
proper knowledge. Therefore God knows things besides Himself by general,
and not by proper knowledge.

Aquin.: SMT FP Q[14] A[6] Obj. 2 Para. 1/1

OBJ 2: Further, the created essence is as distant from the divine
essence, as the divine essence is distant from the created essence. But
the divine essence cannot be known by the created essence, as said above
(Q[12]/A[2]). Therefore neither can the created essence be known by the
divine essence. Thus as God knows only by His essence, it follows that He
does not know what the creature is in its essence, so as to know "what it
is," which is to have proper knowledge of it.

Aquin.: SMT FP Q[14] A[6] Obj. 3 Para. 1/1

OBJ 3: Further, proper knowledge of a thing can come only through its
proper ratio. But as God knows all things by His essence, it seems that
He does not know each thing by its proper ratio; for one thing cannot be
the proper ratio of many and diverse things. Therefore God has not a
proper knowledge of things, but a general knowledge; for to know things
otherwise than by their proper ratio is to have only a common and general
knowledge of them.

Aquin.: SMT FP Q[14] A[6] OTC Para. 1/1

On the contrary, To have a proper knowledge of things is to know them
not only in general, but as they are distinct from each other. Now God
knows things in that manner. Hence it is written that He reaches "even to
the division of the soul and the spirit, of the joints also and the marrow, and is a discerner of thoughts and intents of the heart; neither
is there any creature invisible in His sight" (Heb. 4:12,13).

Aquin.: SMT FP Q[14] A[6] Body Para. 1/4

I answer that, Some have erred on this point, saying that God knows
things other than Himself only in general, that is, only as beings. For
as fire, if it knew the nature of heat, and all things else in so far as
they are hot; so God, through knowing Himself as the principle of being,
knows the nature of being, and all other things in so far as they are
beings.

Aquin.: SMT FP Q[14] A[6] Body Para. 2/4

But this cannot be. For to know a thing in general and not in
particular, is to have an imperfect knowledge. Hence our intellect, when
it is reduced from potentiality to act, acquires first a universal and
confused knowledge of things, before it knows them in particular; as
proceeding from the imperfect to the perfect, as is clear from Phys. i.
If therefore the knowledge of God regarding things other than Himself is
only universal and not special, it would follow that His understanding
would not be absolutely perfect; therefore neither would His being be
perfect; and this is against what was said above (Q[4], A[1]). We must
therefore hold that God knows things other than Himself with a proper
knowledge; not only in so far as being is common to them, but in so far
as one is distinguished from the other. In proof thereof we may observe
that some wishing to show that God knows many things by one, bring
forward some examples, as, for instance, that if the centre knew itself,
it would know all lines that proceed from the centre; or if light knew
itself, it would know all colors.

Aquin.: SMT FP Q[14] A[6] Body Para. 3/4

Now these examples although they are similar in part, namely, as regards
universal causality, nevertheless they fail in this respect, that
multitude and diversity are caused by the one universal principle, not as
regards that which is the principle of distinction, but only as regards
that in which they communicate. For the diversity of colors is not caused
by the light only, but by the different disposition of the diaphanous
medium which receives it; and likewise, the diversity of the lines is
caused by their different position. Hence it is that this kind of
diversity and multitude cannot be known in its principle by proper
knowledge, but only in a general way. In God, however, it is otherwise.
For it was shown above (Q[4], A[2]) that whatever perfection exists in
any creature, wholly pre-exists and is contained in God in an excelling
manner. Now not only what is common to creatures--viz. being - belongs to
their perfection, but also what makes them distinguished from each other;
as living and understanding, and the like, whereby living beings are
distinguished from the non-living, and the intelligent from the
non-intelligent. Likewise every form whereby each thing is constituted in
its own species, is a perfection; and thus all things pre-exist in God,
not only as regards what is common to all, but also as regards what
distinguishes one thing from another. And therefore as God contains all
perfections in Himself, the essence of God is compared to all other
essences of things, not as the common to the proper, as unity is to
numbers, or as the centre (of a circle) to the (radiating) lines; but as
perfect acts to imperfect; as if I were to compare man to animal; or six,
a perfect number, to the imperfect numbers contained under it. Now it is
manifest that by a perfect act imperfect acts can be known not only in
general, but also by proper knowledge; thus, for example, whoever knows a
man, knows an animal by proper knowledge; and whoever knows the number
six, knows the number three also by proper knowledge.

Aquin.: SMT FP Q[14] A[6] Body Para. 4/4

As therefore the essence of God contains in itself all the perfection
contained in the essence of any other being, and far more, God can know
in Himself all of them with proper knowledge. For the nature proper to
each thing consists in some degree of participation in the divine
perfection. Now God could not be said to know Himself perfectly unless He
knew all the ways in which His own perfection can be shared by others.
Neither could He know the very nature of being perfectly, unless He knew
all modes of being. Hence it is manifest that God knows all things with
proper knowledge, in their distinction from each other.

Aquin.: SMT FP Q[14] A[6] R.O. 1 Para. 1/2

Reply OBJ 1: So to know a thing as it is in the knower, may be
understood in two ways. In one way this adverb "so" imports the mode of
knowledge on the part of the thing known; and in that sense it is false.
For the knower does not always know the object known according to the
existence it has in the knower; since the eye does not know a stone
according to the existence it has in the eye; but by the image of the
stone which is in the eye, the eye knows the stone according to its
existence outside the eye. And if any knower has a knowledge of the
object known according to the (mode of) existence it has in the knower,
the knower nevertheless knows it according to its (mode of) existence
outside the knower; thus the intellect knows a stone according to the
intelligible existence it has in the intellect, inasmuch as it knows that
it understands; while nevertheless it knows what a stone is in its own
nature. If however the adverb 'so' be understood to import the mode (of
knowledge) on the part of the knower, in that sense it is true that only
the knower has knowledge of the object known as it is in the knower; for
the more perfectly the thing known is in the knower, the more perfect is
the mode of knowledge.

Aquin.: SMT FP Q[14] A[6] R.O. 1 Para. 2/2

We must say therefore that God not only knows that all things are in
Himself; but by the fact that they are in Him, He knows them in their own
nature and all the more perfectly, the more perfectly each one is in Him.

Aquin.: SMT FP Q[14] A[6] R.O. 2 Para. 1/1

Reply OBJ 2: The created essence is compared to the essence of God as
the imperfect to the perfect act. Therefore the created essence cannot
sufficiently lead us to the knowledge of the divine essence, but rather
the converse.

Aquin.: SMT FP Q[14] A[6] R.O. 3 Para. 1/1

Reply OBJ 3: The same thing cannot be taken in an equal manner as the
ratio of different things. But the divine essence excels all creatures.
Hence it can be taken as the proper ration of each thing according to
the diverse ways in which diverse creatures participate in, and imitate
it.


Aquin.: SMT FP Q[14] A[7] Thes. Para. 1/1

Whether the knowledge of God is discursive?

Aquin.: SMT FP Q[14] A[7] Obj. 1 Para. 1/1

OBJ 1: It seems that the knowledge of God is discursive. For the
knowledge of God is not habitual knowledge, but actual knowledge. Now the
Philosopher says (Topic. ii): "The habit of knowledge may regard many
things at once; but actual understanding regards only one thing at a
time." Therefore as God knows many things, Himself and others, as shown
above (AA 2,5), it seems that He does not understand all at once, but
discourses from one to another.

Aquin.: SMT FP Q[14] A[7] Obj. 2 Para. 1/1

OBJ 2: Further, discursive knowledge is to know the effect through its
cause. But God knows things through Himself; as an effect (is known)
through its cause. Therefore His knowledge is discursive.

Aquin.: SMT FP Q[14] A[7] Obj. 3 Para. 1/1

OBJ 3: Further, God knows each creature more perfectly than we know it.
But we know the effects in their created causes; and thus we go
discursively from causes to things caused. Therefore it seems that the
same applies to God.

Aquin.: SMT FP Q[14] A[7] OTC Para. 1/1

On the contrary, Augustine says (De Trin. xv), "God does not see all
things in their particularity or separately, as if He saw alternately
here and there; but He sees all things together at once."

Aquin.: SMT FP Q[14] A[7] Body Para. 1/1

I answer that, In the divine knowledge there is no discursion; the proof
of which is as follows. In our knowledge there is a twofold discursion:
one is according to succession only, as when we have actually understood
anything, we turn ourselves to understand something else; while the other
mode of discursion is according to causality, as when through principles
we arrive at the knowledge of conclusions. The first kind of discursion
cannot belong to God. For many things, which we understand in succession
if each is considered in itself, we understand simultaneously if we see
them in some one thing; if, for instance, we understand the parts in the
whole, or see different things in a mirror. Now God sees all things in
one (thing), which is Himself. Therefore God sees all things together,
and not successively. Likewise the second mode of discursion cannot be
applied to God. First, because this second mode of discursion presupposes
the first mode; for whosoever proceeds from principles to conclusions
does not consider both at once; secondly, because to discourse thus is to
proceed from the known to the unknown. Hence it is manifest that when the
first is known, the second is still unknown; and thus the second is known
not in the first, but from the first. Now the term discursive reasoning
is attained when the second is seen in the first, by resolving the
effects into their causes; and then the discursion ceases. Hence as God
sees His effects in Himself as their cause, His knowledge is not
discursive.

Aquin.: SMT FP Q[14] A[7] R.O. 1 Para. 1/1

Reply OBJ 1: Altogether there is only one act of understanding in
itself, nevertheless many things may be understood in one (medium), as
shown above.

Aquin.: SMT FP Q[14] A[7] R.O. 2 Para. 1/1

Reply OBJ 2: God does not know by their cause, known, as it were
previously, effects unknown; but He knows the effects in the cause; and
hence His knowledge is not discursive, as was shown above.

Aquin.: SMT FP Q[14] A[7] R.O. 3 Para. 1/1

Reply OBJ 3: God sees the effects of created causes in the causes
themselves, much better than we can; but still not in such a manner that
the knowledge of the effects is caused in Him by the knowledge of the
created causes, as is the case with us; and hence His knowledge is not
discursive.


Aquin.: SMT FP Q[14] A[8] Thes. Para. 1/1

Whether the knowledge of God is the cause of things?

Aquin.: SMT FP Q[14] A[8] Obj. 1 Para. 1/1

OBJ 1: It seems that the knowledge of God is not the cause of things.
For Origen says, on Rm. 8:30, "Whom He called, them He also justified,"
etc.: "A thing will happen not because God knows it as future; but
because it is future, it is on that account known by God, before it
exists."

Aquin.: SMT FP Q[14] A[8] Obj. 2 Para. 1/1

OBJ 2: Further, given the cause, the effect follows. But the knowledge
of God is eternal. Therefore if the knowledge of God is the cause of
things created, it seems that creatures are eternal.

Aquin.: SMT FP Q[14] A[8] Obj. 3 Para. 1/1

OBJ 3: Further, "The thing known is prior to knowledge, and is its
measure," as the Philosopher says (Metaph. x). But what is posterior and
measured cannot be a cause. Therefore the knowledge of God is not the
cause of things.

Aquin.: SMT FP Q[14] A[8] OTC Para. 1/1

On the contrary, Augustine says (De Trin. xv), "Not because they are,
does God know all creatures spiritual and temporal, but because He knows
them, therefore they are."

Aquin.: SMT FP Q[14] A[8] Body Para. 1/1

I answer that, The knowledge of God is the cause of things. For the
knowledge of God is to all creatures what the knowledge of the artificer
is to things made by his art. Now the knowledge of the artificer is the
cause of the things made by his art from the fact that the artificer
works by his intellect. Hence the form of the intellect must be the
principle of action; as heat is the principle of heating. Nevertheless,
we must observe that a natural form, being a form that remains in that to
which it gives existence, denotes a principle of action according only as
it has an inclination to an effect; and likewise, the intelligible form
does not denote a p