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   Chapter, §                                 grey = Comment text

 1   1, 3 |           an action which renders natural processes infertile into
 2   1, 4 |    teaching which is based on the natural law as illuminated and enriched
 3   1, 4 |      magisterium to interpret the natural moral law. It is in fact
 4   1, 4 |        the Gospel but also of the natural law. For the natural law,
 5   1, 4 |          the natural law. For the natural law, too, declares the will
 6   2, 7 |           be considered: both its natural, earthly aspects and its
 7   2, 8 |         of the blind evolution of natural forces. It is in reality
 8   2, 9 |        then, merely a question of natural instinct or emotional drive.
 9   2    |                     Observing the Natural Law~
10   2, 11|          to be infertile. For its natural adaptation to the expression
11   2, 11| observance of the precepts of the natural law, which it interprets
12   2, 16|        then take advantage of the natural cycles immanent in the reproductive
13   2, 16|          latter they obstruct the natural development of the generative
14   2    |         over his own body and its natural functions—limits, let it
15   2    |      whole human organism and its natural functions, in the light
16   2, 18|        the entire moral law, both natural and evangelical. ~Since
17   3, 21|         they are to control their natural drives, there can be no
18   3, 23|          which are opposed to the natural law of God. For there are
19   3, 24|    science should by the study of natural rhythms succeed in determining