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St. Thomas Aquinas
Summa Theologica

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  • FIRST PART (FP: QQ 1-119)
      • Aquin.: SMT FP Q[117] Out. Para. 1/2 - OF THINGS PERTAINING TO THE ACTION OF MAN (FOUR ARTICLES)
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Aquin.: SMT FP Q[117] Out. Para. 1/2 - OF THINGS PERTAINING TO THE ACTION OF MAN (FOUR ARTICLES)

We have next to consider those things which pertain to the action of
man, who is composed of a created corporeal and spiritual nature. In the
first place we shall consider that action (in general) and secondly in
regard to the propagation of man from man. As to the first, there are
four points of inquiry:

(1) Whether one man can teach another, as being the cause of his
knowledge?

(2) Whether man can teach an angel?

(3) Whether by the power of his soul man can change corporeal matter?

(4) Whether the separate soul of man can move bodies by local movement?

Aquin.: SMT FP Q[117] Out. Para. 2/2



Aquin.: SMT FP Q[117] A[1] Thes. Para. 1/1

Whether one man can teach another?

Aquin.: SMT FP Q[117] A[1] Obj. 1 Para. 1/1

OBJ 1: It would seem that one man cannot teach another. For the Lord
says (Mt. 22:8): "Be not you called Rabbi": on which the gloss of Jerome
says, "Lest you give to men the honor due to God." Therefore to be a
master is properly an honor due to God. But it belongs to a master to
teach. Therefore man cannot teach, and this is proper to God.

Aquin.: SMT FP Q[117] A[1] Obj. 2 Para. 1/1

OBJ 2: Further, if one man teaches another this is only inasmuch as he
acts through his own knowledge, so as to cause knowledge in the other.
But a quality through which anyone acts so as to produce his like, is an
active quality. Therefore it follows that knowledge is an active quality
just as heat is.

Aquin.: SMT FP Q[117] A[1] Obj. 3 Para. 1/1

OBJ 3: Further, for knowledge we require intellectual light, and the
species of the thing understood. But a man cannot cause either of these
in another man. Therefore a man cannot by teaching cause knowledge in
another man.

Aquin.: SMT FP Q[117] A[1] Obj. 4 Para. 1/1

OBJ 4: Further, the teacher does nothing in regard to a disciple save to
propose to him certain signs, so as to signify something by words or
gestures. But it is not possible to teach anyone so as to cause knowledge
in him, by putting signs before him. For these are signs either of things
that he knows, or of things he does not know. If of things that he knows,
he to whom these signs are proposed is already in the possession of
knowledge, and does not acquire it from the master. If they are signs of
things that he does not know, he can learn nothing therefrom: for
instance, if one were to speak Greek to a man who only knows Latin, he
would learn nothing thereby. Therefore in no way can a man cause
knowledge in another by teaching him.

Aquin.: SMT FP Q[117] A[1] OTC Para. 1/1

On the contrary, The Apostle says (1 Tm. 2:7): "Whereunto I am appointed
a preacher and an apostle . . . a doctor of the Gentiles in faith and
truth."

Aquin.: SMT FP Q[117] A[1] Body Para. 1/5

I answer that, On this question there have been various opinions. For
Averroes, commenting on De Anima iii, maintains that all men have one
passive intellect in common, as stated above (Q[76], A[2]). From this it
follows that the same intelligible species belong to all men.
Consequently he held that one man does not cause another to have a
knowledge distinct from that which he has himself; but that he
communicates the identical knowledge which he has himself, by moving him
to order rightly the phantasms in his soul, so that they be rightly
disposed for intelligible apprehension. This opinion is true so far as
knowledge is the same in disciple and master, if we consider the
identity of the thing known: for the same objective truth is known by
both of them. But so far as he maintains that all men have but one
passive intellect, and the same intelligible species, differing only as
to various phantasms, his opinion is false, as stated above (Q[76], A[2]).

Aquin.: SMT FP Q[117] A[1] Body Para. 2/5

Besides this, there is the opinion of the Platonists, who held that our
souls are possessed of knowledge from the very beginning, through the
participation of separate forms, as stated above (Q[84], AA[3],4); but
that the soul is hindered, through its union with the body, from the free
consideration of those things which it knows. According to this, the
disciple does not acquire fresh knowledge from his master, but is roused
by him to consider what he knows; so that to learn would be nothing else
than to remember. In the same way they held that natural agents only
dispose (matter) to receive forms, which matter acquires by a
participation of separate substances. But against this we have proved
above (Q[79], A[2]; Q[84], A[3]) that the passive intellect of the human
soul is in pure potentiality to intelligible (species), as Aristotle says
(De Anima iii, 4).

Aquin.: SMT FP Q[117] A[1] Body Para. 3/5
We must therefore decide the question differently, by saying that the
teacher causes knowledge in the learner, by reducing him from
potentiality to act, as the Philosopher says (Phys. viii, 4). In order to
make this clear, we must observe that of effects proceeding from an
exterior principle, some proceed from the exterior principle alone; as
the form of a house is caused to be in matter by art alone: whereas other
effects proceed sometimes from an exterior principle, sometimes from an
interior principle: thus health is caused in a sick man, sometimes by an
exterior principle, namely by the medical art, sometimes by an interior
principle as when a man is healed by the force of nature. In these latter
effects two things must be noticed. First, that art in its work imitates
nature for just as nature heals a man by alteration, digestion, rejection
of the matter that caused the sickness, so does art. Secondly, we must
remark that the exterior principle, art, acts, not as principal agent,
but as helping the principal agent, but as helping the principal agent,
which is the interior principle, by strengthening it, and by furnishing
it with instruments and assistance, of which the interior principle makes
use in producing the effect. Thus the physician strengthens nature, and
employs food and medicine, of which nature makes use for the intended end.

Aquin.: SMT FP Q[117] A[1] Body Para. 4/5

Now knowledge is acquired in man, both from an interior principle, as is
clear in one who procures knowledge by his own research; and from an
exterior principle, as is clear in one who learns (by instruction). For
in every man there is a certain principle of knowledge, namely the light
of the active intellect, through which certain universal principles of
all the sciences are naturally understood as soon as proposed to the
intellect. Now when anyone applies these universal principles to certain
particular things, the memory or experience of which he acquires through
the senses; then by his own research advancing from the known to the
unknown, he obtains knowledge of what he knew not before. Wherefore
anyone who teaches, leads the disciple from things known by the latter,
to the knowledge of things previously unknown to him; according to what
the Philosopher says (Poster. i, 1): "All teaching and all learning
proceed from previous knowledge."

Aquin.: SMT FP Q[117] A[1] Body Para. 5/5

Now the master leads the disciple from things known to knowledge of the
unknown, in a twofold manner. Firstly, by proposing to him certain helps
or means of instruction, which his intellect can use for the acquisition
of science: for instance, he may put before him certain less universal
propositions, of which nevertheless the disciple is able to judge from
previous knowledge: or he may propose to him some sensible examples,
either by way of likeness or of opposition, or something of the sort,
from which the intellect of the learner is led to the knowledge of truth previously unknown. Secondly, by strengthening the intellect of the
learner; not, indeed, by some active power as of a higher nature, as
explained above (Q[106], A[1]; Q[111], A[1]) of the angelic
enlightenment, because all human intellects are of one grade in the
natural order; but inasmuch as he proposes to the disciple the order of
principles to conclusions, by reason of his not having sufficient
collating power to be able to draw the conclusions from the principles.
Hence the Philosopher says (Poster. i, 2) that "a demonstration is a
syllogism that causes knowledge." In this way a demonstrator causes his
hearer to know.

Aquin.: SMT FP Q[117] A[1] R.O. 1 Para. 1/1

Reply OBJ 1: As stated above, the teacher only brings exterior help as
the physician who heals: but just as the interior nature is the principal
cause of the healing, so the interior light of the intellect is the
principal cause of knowledge. But both of these are from God. Therefore
as of God is it written: "Who healeth all thy diseases" (Ps. 102:3); so
of Him is it written: "He that teacheth man knowledge" (Ps. 93:10),
inasmuch as "the light of His countenance is signed upon us" (Ps. 4:7),
through which light all things are shown to us.

Aquin.: SMT FP Q[117] A[1] R.O. 2 Para. 1/1

Reply OBJ 2: As Averroes argues, the teacher does not cause knowledge in
the disciple after the manner of a natural active cause. Wherefore
knowledge need not be an active quality: but is the principle by which
one is directed in teaching, just as art is the principle by which one is
directed in working.

Aquin.: SMT FP Q[117] A[1] R.O. 3 Para. 1/1

Reply OBJ 3: The master does not cause the intellectual light in the
disciple, nor does he cause the intelligible species directly: but he
moves the disciple by teaching, so that the latter, by the power of his
intellect, forms intelligible concepts, the signs of which are proposed
to him from without.

Aquin.: SMT FP Q[117] A[1] R.O. 4 Para. 1/1

Reply OBJ 4: The signs proposed by the master to the disciple are of
things known in a general and confused manner; but not known in detail
and distinctly. Therefore when anyone acquires knowledge by himself, he
cannot be called self-taught, or be said to have his own master because
perfect knowledge did not precede in him, such as is required in a
master.

(tm)Aquin.: SMT FP Q[117] A[2] Thes. Para. 1/1

Whether man can teach the angels?

Aquin.: SMT FP Q[117] A[2] Obj. 1 Para. 1/1

OBJ 1: It would seem that men teach angels. For the Apostle says (Eph.
3:10): "That the manifold wisdom of God may be made known to the
principalities and powers in the heavenly places through the Church." But
the Church is the union of all the faithful. Therefore some things are
made known to angels through men.

Aquin.: SMT FP Q[117] A[2] Obj. 2 Para. 1/1

OBJ 2: Further, the superior angels, who are enlightened immediately
concerning Divine things by God, can instruct the inferior angels, as
stated above (Q[116], A[1]; Q[112], A[3]). But some men are instructed
immediately concerning Divine things by the Word of God; as appears
principally of the apostles from Heb. 1:1,2: "Last of all, in these days
(God) hath spoken to us by His Son." Therefore some men have been able to
teach the angels.

Aquin.: SMT FP Q[117] A[2] Obj. 3 Para. 1/1

OBJ 3: Further, the inferior angels are instructed by the superior. But
some men are higher than some angels; since some men are taken up to the
highest angelic orders, as Gregory says in a homily (Hom. xxxiv in
Evang.). Therefore some of the inferior angels can be instructed by men
concerning Divine things.

Aquin.: SMT FP Q[117] A[2] OTC Para. 1/1

On the contrary, Dionysius says (Div. Nom. iv) that every Divine
enlightenment to the superior angels, by making their thoughts known to
them; but concerning Divine things superior angels are never enlightened
by inferior angels. Now it is manifest that in the same way as inferior
angels are subject to the superior, the highest men are subject even to
the lowest angels. This is clear from Our Lord's words (Mt. 11:11):
"There hath not risen among them that are born of woman a greater than
John the Baptist; yet he that is lesser in the kingdom of heaven is
greater than he." Therefore angels are never enlightened by men
concerning Divine things. But men can by means of speech make known to
angels the thoughts of their hearts: because it belongs to God alone to
know the heart's secrets.

Aquin.: SMT FP Q[117] A[2] R.O. 1 Para. 1/2

Reply OBJ 1: Augustine (Gen. ad lit. v, 19) thus explains this passage
of the Apostle, who in the preceding verses says: "To me, the least of
all the saints, is given this grace . . . to enlighten all men, that they
may see what is the dispensation of the mystery which hath been hidden
from eternity in God. Hidden, yet so that the multiform wisdom of God was
made known to the principalities and powers in the heavenly places - that
is, through the Church." As though he were to say: This mystery was
hidden from men, but not from the Church in heaven, which is contained in
the principalities and powers who knew it "from all ages, but not before
all ages: because the Church was at first there, where after the
resurrection this Church composed of men will be gathered together."

Aquin.: SMT FP Q[117] A[2] R.O. 1 Para. 2/2

It can also be explained otherwise that "what is hidden, is known by the
angels, not only in God, but also here where when it takes place and is
made public," as Augustine says further on (Gen. ad lit. v, 19). Thus
when the mysteries of Christ and the Church were fulfilled by the
apostles, some things concerning these mysteries became apparent to the
angels, which were hidden from them before. In this way we can understand
what Jerome says (Comment. in Ep. ad Eph.) - that from the preaching of
the apostles the angels learned certain mysteries; that is to say,
through the preaching of the apostles, the mysteries were realized in the
things themselves: thus by the preaching of Paul the Gentiles were
converted, of which mystery the Apostle is speaking in the passage quoted.

Aquin.: SMT FP Q[117] A[2] R.O. 2 Para. 1/1

Reply OBJ 2: The apostles were instructed immediately by the Word of
God, not according to His Divinity, but according as He spoke in His
human nature. Hence the argument does not prove.

Aquin.: SMT FP Q[117] A[2] R.O. 3 Para. 1/1

Reply OBJ 3: Certain men in this state of life are greater than certain
angels, not actually, but virtually; forasmuch as they have such great
charity that they can merit a higher degree of beatitude than that
possessed by certain angels. In the same way we might say that the seed
of a great tree is virtually greater than a small tree, though actually
it is much smaller.


Aquin.: SMT FP Q[117] A[3] Thes. Para. 1/1

Whether man by the power of his soul can change corporeal matter?

Aquin.: SMT FP Q[117] A[3] Obj. 1 Para. 1/1

OBJ 1: It would seem that man by the power of his soul can change
corporeal matter. For Gregory says (Dialog. ii, 30): "Saints work
miracles sometimes by prayer, sometimes by their power: thus Peter, by
prayer, raised the dead Tabitha to life, and by his reproof delivered to
death the lying Ananias and Saphira." But in the working of miracles a
change is wrought in corporeal matter. Therefore men, by the power of the
soul, can change corporeal matter.

Aquin.: SMT FP Q[117] A[3] Obj. 2 Para. 1/1

OBJ 2: Further, on these words (Gal. 3:1): "Who hath bewitched you, that
you should not obey the truth?" the gloss says that "some have blazing
eyes, who by a single look bewitch others, especially children." But this
would not be unless the power of the soul could change corporeal matter.
Therefore man can change corporeal matter by the power of his soul.

Aquin.: SMT FP Q[117] A[3] Obj. 3 Para. 1/1

OBJ 3: Further, the human body is nobler than other inferior bodies. But
by the apprehension of the human soul the human body is changed to heat
and cold, as appears when a man is angry or afraid: indeed this change
sometimes goes so far as to bring on sickness and death. Much more, then,
can the human soul by its power change corporeal matter.

Aquin.: SMT FP Q[117] A[3] OTC Para. 1/1

On the contrary, Augustine says (De Trin. iii, 8): "Corporeal matter
obeys God alone at will."

Aquin.: SMT FP Q[117] A[3] Body Para. 1/1

I answer that, As stated above (Q[110], A[2]), corporeal matter is not
changed to (the reception of) a form save either by some agent composed
of matter and form, or by God Himself, in whom both matter and form
pre-exist virtually, as in the primordial cause of both. Wherefore of the
angels also we have stated (Q[110], A[2]) that they cannot change
corporeal matter by their natural power, except by employing corporeal
agents for the production of certain effects. Much less therefore can the
soul, by its natural power, change corporeal matter, except by means of
bodies.

Aquin.: SMT FP Q[117] A[3] R.O. 1 Para. 1/1

Reply OBJ 1: The saints are said to work miracles by the power of grace,
not of nature. This is clear from what Gregory says in the same place:
"Those who are sons of God, in power, as John says - what wonder is there
that they should work miracles by that power?"

Aquin.: SMT FP Q[117] A[3] R.O. 2 Para. 1/3

Reply OBJ 2: Avicenna assigns the cause of bewitchment to the fact that
corporeal matter has a natural tendency to obey spiritual substance
rather than natural contrary agents. Therefore when the soul is of strong
imagination, it can change corporeal matter. This he says is the cause of
the "evil eye."

Aquin.: SMT FP Q[117] A[3] R.O. 2 Para. 2/3

But it has been shown above (Q[110], A[2]) that corporeal matter does
not obey spiritual substances at will, but the Creator alone. Therefore
it is better to say, that by a strong imagination the (corporeal) spirits
of the body united to that soul are changed, which change in the spirits
takes place especially in the eyes, to which the more subtle spirits can
reach. And the eyes infect the air which is in contact with them to a
certain distance: in the same way as a new and clear mirror contracts a tarnish from the look of a "menstruata," as Aristotle says (De Somn. et
Vigil.; [*De Insomniis ii]).

Aquin.: SMT FP Q[117] A[3] R.O. 2 Para. 3/3

Hence then when a soul is vehemently moved to wickedness, as occurs
mostly in little old women, according to the above explanation, the
countenance becomes venomous and hurtful, especially to children, who
have a tender and most impressionable body. It is also possible that by
God's permission, or from some hidden deed, the spiteful demons
co-operate in this, as the witches may have some compact with them.

Aquin.: SMT FP Q[117] A[3] R.O. 3 Para. 1/1

Reply OBJ 3: The soul is united to the body as its form; and the
sensitive appetite, which obeys the reason in a certain way, as stated
above (Q[81], A[3]), it is the act of a corporeal organ. Therefore at the
apprehension of the human soul, the sensitive appetite must needs be
moved with an accompanying corporeal operation. But the apprehension of
the human soul does not suffice to work a change in exterior bodies,
except by means of a change in the body united to it, as stated above (ad
2).


Aquin.: SMT FP Q[117] A[4] Thes. Para. 1/1

Whether the separate human soul can move bodies at least locally?

Aquin.: SMT FP Q[117] A[4] Obj. 1 Para. 1/1

OBJ 1: It seems that the separate human soul can move bodies at least
locally. For a body naturally obeys a spiritual substance as to local
motion, as stated above (Q[110], A[5]). But the separate soul is a
spiritual substance. Therefore it can move exterior bodies by its
command.

Aquin.: SMT FP Q[117] A[4] Obj. 2 Para. 1/1

OBJ 2: Further, in the Itinerary of Clement it is said in the narrative
of Nicetas to Peter, that Simon Magus, by sorcery retained power over the
soul of a child that he had slain, and that through this soul he worked
magical wonders. But this could not have been without some corporeal
change at least as to place. Therefore, the separate soul has the power
to move bodies locally.

Aquin.: SMT FP Q[117] A[4] OTC Para. 1/1

On the contrary, the Philosopher says (De Anima i, 3) that the soul
cannot move any other body whatsoever but its own.

Aquin.: SMT FP Q[117] A[4] Body Para. 1/1

I answer that, The separate soul cannot by its natural power move a
body. For it is manifest that, even while the soul is united to the body,
it does not move the body except as endowed with life: so that if one of
the members become lifeless, it does not obey the soul as to local
motion. Now it is also manifest that no body is quickened by the separate
soul. Therefore within the limits of its natural power the separate soul
cannot command the obedience of a body; though, by the power of God, it
can exceed those limits.

Aquin.: SMT FP Q[117] A[4] R.O. 1 Para. 1/1

Reply OBJ 1: There are certain spiritual substances whose powers are not
determinate to certain bodies; such are the angels who are naturally
unfettered by a body; consequently various bodies may obey them as to
movement. But if the motive power of a separate substance is naturally
determinate to move a certain body, that substance will not be able to
move a body of higher degree, but only one of lower degree: thus
according to philosophers the mover of the lower heaven cannot move the
higher heaven. Wherefore, since the soul is by its nature determinate to
move the body of which it is the form, it cannot by its natural power
move any other body.

Aquin.: SMT FP Q[117] A[4] R.O. 2 Para. 1/1

Reply OBJ 2: As Augustine (De Civ. Dei x, 11) and Chrysostom (Hom.
xxviii in Matt.) say, the demons often pretend to be the souls of the
dead, in order to confirm the error of heathen superstition. It is
therefore credible that Simon Magus was deceived by some demon who
pretended to be the soul of the child whom the magician had slain.





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