Book,  Paragraph

 1   I,  2 |         downward motion are the contraries of one another. If, on the
 2   I,  3 | discussions. Now the motions of contraries are contrary. If then this
 3   I,  3 |    justly to have exempted from contraries the body which was to be
 4   I,  3 |    indestructible. For it is in contraries that generation and decay
 5   I,  4 |        even supposing these are contraries, it in no way follows that
 6   I,  4 |      the complete circumference contraries. Nor again can motion along
 7   I,  6 |        and downward motions are contraries and are therefore motions
 8   I,  6 |         But if one of a pair of contraries is determinate, the other
 9   I,  12|         which is neither of two contraries is a mean between them.
10   I,  12|        Now alteration is due to contraries, and the things which compose
11  II,  3 |        For, if one of a pair of contraries naturally exists, the other,
12  II,  3 |    present, since the matter of contraries is the same. Also, the positive
13  II,  3 |        them can be eternal: for contraries interact with one another
14  IV,  2 |       that means only a pair of contraries. If there is a single matter,
15  IV,  5 |       intermediates between the contraries, as in the case of colour;