16 Yet, owing to the efforts of the archenemy of mankind, there are persons who, thanklessly casting away so many other blessings of redemption, despise also or utterly ignore the restoration of marriage to its original perfection. It is a reproach to some of the ancients that they showed themselves the enemies of marriage in many ways; but in our own age, much more pernicious is the sin of those who would fain pervert utterly the nature of marriage, perfect though it is, and complete in all its details and parts. The chief reason why they act in this way is because very many, imbued with the maxims of a false philosophy and corrupted in morals, judge nothing so unbearable as submission and obedience; and strive with all their might to bring about that not only individual men, but families, also-indeed, human society itself-may in haughty pride despise the sovereignty of God.
Source: Arcanum Divinae (Vatican.va)