Book, Paragraph

 1   I,  1 |        and understand, first its essential nature, and secondly its
 2   I,  1 |  applicable to all objects whose essential nature (as we are endeavouring
 3   I,  1 |        to be acquainted with the essential nature of those substances (
 4   I,  1 |         right angles to know the essential nature of the straight and
 5   I,  1 |         for the knowledge of the essential nature of a substance is
 6   I,  1 | something worth saying about the essential nature of that subject;
 7   I,  3 |          be a departure from its essential nature, at least if its
 8   I,  3 |          if its self-movement is essential to it, not incidental.~Some
 9  II,  1 |       That means that it is "the essential whatness" of a body of the
10  II,  1 |        were a natural body, its "essential whatness", would have been
11 III,  1 |        or in all-warmth being an essential condition of all sensibility-and
12 III,  4 |      ratio constitute flesh: the essential character of flesh is apprehended
13 III,  5 |      unmixed, since it is in its essential nature activity (for always
14 III,  13|     destroys touch, which is the essential mark of life; for it has