Book,  Paragraph

 1   I,  2 |     simple bodies. Again, if the unnatural movement is the contrary
 2   I,  2 |         a simple motion, must be unnatural, if it is not natural, to
 3   I,  2 |         circular motion which is unnatural to it is something different
 4   I,  2 |    movement is either natural or unnatural, and that the movement which
 5   I,  2 |       that the movement which is unnatural to one body is natural to
 6   I,  2 | movements, which are natural and unnatural to fire and earth respectively.
 7   I,  2 |         circular movement, being unnatural to these bodies, is the
 8   I,  2 |       bodies about the centre is unnatural, it would be remarkable
 9   I,  2 |      goes to show that it is the unnatural which quickest passes away.
10   I,  2 |         this movement is just as unnatural to it as downward movement;
11   I,  3 |       then, that the movement is unnatural. In that case, if it is
12   I,  3 |       downward movement which is unnatural, the upward movement will
13   I,  3 |        it is the upward which is unnatural, the downward will be natural.
14   I,  3 |         movements, if the one is unnatural to anything, the other will
15   I,  7 |       great, for the goal of its unnatural movement. Moreover, whether
16   I,  8 |       And its position cannot be unnatural to it, for it would have
17   I,  9 |        must be either natural or unnatural. But it cannot be any of
18   I,  9 |           since a place which is unnatural to one body must be natural
19  II,  3 |          be eternal: for nothing unnatural is eternal. The unnatural
20  II,  3 |        unnatural is eternal. The unnatural is subsequent to the natural,
21  II,  6 |         its maximum at the goal, unnatural motion at the starting-point,
22  II,  6 |    incapacity, and incapacity is unnatural. The incapacities of animals,
23  II,  6 |     decay, and the like, are all unnatural, due, it seems, to the fact
24  II,  6 |         primary contains nothing unnatural, being simple and unmixed
25  II,  6 |          which, like incapacity, unnatural ever continues for an infinity
26  II,  6 |   infinity of time; nor does the unnatural endure as long as the natural,
27  II,  14|     Being, then, constrained and unnatural, the movement could not
28 III,  2 |   constrained is the same as the unnatural. Now an unnatural movement
29 III,  2 |         as the unnatural. Now an unnatural movement presupposes a natural
30 III,  2 |          which, however many the unnatural movements, is always one.
31 III,  2 |      moves in one way, while its unnatural movements are manifold.
32 III,  2 |        movement means in reality unnatural movement, since the order
33 III,  2 |     natural, and order or system unnatural. But no natural fact can
34 III,  2 |         external force, while an unnatural movement will be due to
35 III,  2 |      light or heavy, and (2) how unnatural movement takes place.~From