Mandating the use of
It is, in fact, indisputable, as our predecessors have many times declared, constituted them as guardians and authentic interpreters of all the moral law, not only, that is, of the law of the Gospel, but also of the natural law, which is also an expression of the will of God, the faithful fulfillment of which is equally necessary for salvation.
The changes which have taken place are in fact noteworthy and of varied kinds.
The problem of birth, like every other problem regarding human life, is to be considered, beyond partial perspectives — whether of the biological or psychological, demographic or sociological orders — in the light of an integral vision of man and of his vocation, not only his natural and earthly, but also his supernatural and eternal vocation.
And since, in the attempt to justify artificial methods of birth control, many have appealed to the demands both of conjugal love and of “responsible parenthood,” it is good to state very precisely the true concept of these two great realities of married life, referring principally to what was recently set forth in this regard, and in a highly authoritative form, by the Second Vatican Council in its pastoral constitution “Gaudium et Spes.”8.
And finally this love is fecund for it is not exhausted by the communion between husband and wife, but is destined to continue, raising up new lives.
“Marriage and conjugal love are by their nature ordained toward the begetting and educating of children.