Book, Paragraph

 1  IV, 7 |      intermediate it is always observed to change into the extremes.
 2   X, 1 |    indivisible.~But it must be observed that the questions, what
 3   X, 2 |     then the other colours are observed to be produced out of this
 4   X, 5 |       no contrariety is either observed to be intermediate, or,
 5  XI, 6 |       things of this earth are observed to change and never to remain
 6  XI, 10|    such product of analysis is observed except the simple bodies),
 7 XII, 8 |       if one is to explain the observed facts; and one more to each
 8 XII, 8 |    combined are to explain the observed facts, that for each of
 9 XII, 8 |     forces at work produce the observed motion of the planets. Since,
10 XII, 9 |      the most divine of things observed by us, the question how
11 XIII, 2|      substance, we should have observed things which could be put
12 XIV, 2 | existing by itself), nor is it observed to be the cause of anything;
13 XIV, 3 |    bodies would exist. But the observed facts show that nature is