Book, Paragraph
1 I, 1 | relates to its principles.~The natural way of doing this is to
2 I, 5 | therefore, that comes to be by a natural process is either a contrary
3 I, 7 | we shall be following the natural order of inquiry if we speak
4 I, 7 | principles which constitute natural objects and from which they
5 I, 7 | number of the principles of natural objects which are subject
6 I, 9 | over till then. But of the natural, i.e. perishable, forms
7 II, 1 | nature or substance of a natural object with that immediate
8 II, 1 | according to nature and the natural in the same way as "art"
9 II, 1 | art. The same is true of natural compounds. What is potentially
10 II, 1 | nature" but "by nature" or "natural".)~The form indeed is "nature"
11 II, 6 | towards which it was the natural means-for it would be absurd
12 II, 6 | change", for either some natural or some intelligent agent
13 II, 8 | For teeth and all other natural things either invariably
14 II, 8 | end, so clearly also are natural products. The relation of
15 II, 8 | attained, so must it be also in natural products, and monstrosities
16 II, 8 | nature". For those things are natural which, by a continuous movement
17 II, 8 | incidental or by chance. In natural products the sequence is
18 III, 5 | lightness, and if a body has a natural locomotion towards the centre
19 III, 7 | form which contains. It is natural too to suppose that in number
20 IV, 1 | locomotions of the elementary natural bodies-namely, fire, earth,
21 IV, 8 | the simple bodies has a natural locomotion, e.g. fire upward
22 IV, 8 | and "down" in place, as is natural enough since those who maintain
23 IV, 8 | movement there must also be natural (for compulsory movement
24 IV, 8 | so that if each of the natural bodies has not a natural
25 IV, 8 | natural bodies has not a natural movement, none of the other
26 IV, 8 | exist); but how can there be natural movement if there is no
27 IV, 8 | privation of being), but natural locomotion seems to be differentiated,
28 IV, 8 | Either, then, nothing has a natural locomotion, or else there
29 IV, 8 | movement quicker than the natural locomotion of the projectile
30 IV, 9 | hot and cold and the other natural contrarieties, and that
31 IV, 12| time and vice versa. It is natural that this should happen;
32 IV, 14| other things that have a natural movement and coming into
33 V, 3 | changes continuously in a natural manner, naturally reaches
34 V, 3 | necessarily together. So natural junction is last in coming
35 V, 3 | contact clearly there is no natural junction either. Hence,
36 V, 6 | remaining and moving may be natural or unnatural, in the other
37 V, 6 | e.g. alteration is not now natural and now unnatural, for convalescence
38 V, 6 | convalescence is no more natural or unnatural than falling
39 V, 6 | falling ill, whitening no more natural or unnatural than blackening;
40 V, 6 | sense that either of them is natural while the other is unnatural,
41 V, 6 | not true that becoming is natural and perishing unnatural (
42 V, 6 | unnatural (for growing old is natural), nor do we observe one
43 V, 6 | observe one becoming to be natural and another unnatural. We
44 V, 6 | and as such contrary to natural perishing. Are there then
45 V, 6 | violent and not the result of natural necessity, and are therefore
46 V, 6 | are therefore contrary to natural becomings, and violent increases
47 V, 6 | violent while others are natural, e.g. patients alter naturally
48 V, 6 | down unnaturally: and its natural motion is certainly contrary
49 V, 6 | thing is contrary to its natural motion, just as we find
50 V, 6 | or the downward, will be natural, the other unnatural.~Here,
51 V, 6 | unnatural as well as to natural motions. It would be absurd
52 V, 6 | Further, some things have a natural and an unnatural motion,
53 V, 6 | motion, e.g. fire has a natural upward motion and an unnatural
54 V, 6 | downward motion or is it the natural downward motion of earth
55 V, 6 | that is contrary to the natural upward motion? Surely it
56 V, 6 | not in the same sense: the natural motion of earth is contrary
57 V, 6 | the motion of fire is also natural, whereas the upward motion
58 V, 6 | motion of fire as being natural is contrary to the downward
59 VI, 8 | which motion or rest is natural is in motion or at rest
60 VI, 8 | motion or at rest in the natural time, place, and manner,
61 VI, 8 | thing to which motion is natural but which is not in motion
62 VI, 8 | in which) motion would be natural to it. Again, our use of
63 VII, 2 | itself more violent than the natural locomotion of the thing
64 VII, 3 | things it would be most natural to suppose that there is
65 VII, 3 | that we have a thing in its natural state: e.g. we have a perfect
66 VII, 3 | influences that from the natural constitution of a thing
67 VII, 3 | out of the restlessness natural to it. Hence, too, in learning
68 VIII, 4| some cases their motion is natural, in others violent and unnatural.
69 VIII, 4| all animals, the motion is natural (for when an animal is in
70 VIII, 4| motion of that thing is natural. Therefore the animal as
71 VIII, 4| something else is in some cases natural, in other unnatural: e.g.
72 VIII, 4| those whose motion while natural is derived from themselves-e.
73 VIII, 4| fact that the motion is natural. It is in these cases that
74 VIII, 4| thing down-their motion is natural; but in this latter case
75 VIII, 4| when it is unnatural, and natural when it brings to actuality
76 VIII, 4| not knowing. In regard to natural bodies also the case is
77 VIII, 4| for it is that they have a natural tendency respectively towards
78 VIII, 4| are in motion is either natural or unnatural and violent,
79 VIII, 4| all things whose motion is natural are moved by something-both
80 VIII, 6| is connected with other natural motions in animals, which
81 VIII, 7| they have realized their natural development, then this motion
82 VIII, 7| since it would be in the natural order of things that they
83 VIII, 9| hold that the motion of natural substance is motion in respect
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