Part

 1 1 |       nature's work or halt its natural development. ~In such a
 2 2 |         that it was against the natural law and the divine positive
 3 4 |      the protection and care of natural life, much more so must
 4 6 |       in the development of its natural consequences which aims
 5 6 |         but the expression of a natural and divine law. ~Let Our
 6 7 |        is unlawful according to natural law, from which, as you
 7 8 |      recourse to the periods of natural sterility the so-called "
 8 8 |         even during the days of natural sterility no objection can
 9 8 |         the consummation of the natural act and its ulterior natural
10 8 |    natural act and its ulterior natural consequences. It is exactly
11 8 |       the act to the periods of natural sterility does not refer
12 8 |      that the observance of the natural sterile periods may be lawful,
13 9 |     complete performance of the natural faculty. Your apostolate
14 10|     which God, Who also created natural inclinations, offers them.
15 11|       internal structure of the natural disposition reveals. We
16 11|        The conjugal act, in its natural structure, is a personal
17 11|     means, that is, without the natural action of husband and wife.
18 11| Therefore, when this act in its natural form is from the beginning
19 12|    human being, because, if the natural generative tendency does
20 13|         is this: the use of the natural procreative disposition
21 13|    forming and constituting the natural act. Now, instead, all this
22 13|       In general, common sense, natural instinct and a brief instruction
23 13|  explanation in conformity with natural law and with a healthy Christian