Chapter, §

 1   1, 2 |       importance and varied in nature. In the first place there
 2   1, 2 |  organization of the forces of nature to the point that he is
 3   1, 4 |   appropriate documents on the nature of marriage, the correct
 4   2, 8 |  particularly reveals its true nature and nobility when we realize
 5   2, 9 | fidelity is in accord with the nature of marriage, but also that
 6   2, 9 |     conjugal love are by their nature ordained toward the procreation
 7   2, 10|      God the Creator. The very nature of marriage and its use
 8   2, 11|     has wisely ordered laws of nature and the incidence of fertility
 9   2, 12|        is that the fundamental nature of the marriage act, while
10   2, 12|        written into the actual nature of man and of woman. And
11   2, 13|       equally repugnant to the nature of man and of woman, and
12   2, 13|        concerned by their very nature with the generation of life,
13   2, 14|    something which of its very nature contradicts the moral order,
14   2, 16|     those forces of irrational nature which come within its ambit
15   2, 16|       faculty provided them by nature. In the latter they obstruct
16   2, 18|        since that, by its very nature, is always opposed to the
17   3, 31|       has engraved in his very nature. These laws must be wisely