93. This awful example is held up to us lest we persist in sin. For if God did not spare the primitive world, which was so magnificent—the very flower and youth of the world—and in which had lived so many pious men, but, as he says in Psalm 81, 12, "gave them up unto their own hearts' lust," and cast them aside, as if they had no claim upon the promise made to the Church—if he did this, how much less will he spare us who do not possess such prerogatives?
94. Therefore, the decree cited in this passage that God would grant men a hundred and twenty years for repentance, was rendered and promulgated before Noah had begotten children.
95. With reference to the generation of the Cainites, no mention is made of their patriarchs at the time of the flood, nor does Moses even deem them worthy of being named. Previously he has brought down the generation of Cain as far as Lamech, but whether his sons or nephews lived at the time of Noah is uncertain. This much is certain, that the offspring of Cain existed to that time, and were so powerful as to mislead the very sons of God, since even the posterity of the holy patriarchs perished in the flood.
96. Before this time the holy patriarchs—the rulers of the true Church, as it were—admonished their families to beware of the accursed generation. But the Cainites, incensed at being condemned, made the attempt to overturn the righteous with every kind of mischief; for the church of Satan wars perpetually against the Church of God.
97. Therefore, as the righteous begin to waver and wickedness gains ground, God raises Noah to exhort to repentance and to be for his descendants a perpetual example, whose faith and diligent, patient devotion to teaching, his offspring might admire and imitate. A great miracle is it and a case of illustrious faith, that Noah, having heard through Methuselah and Lamech the decree that the world is to perish after a hundred and twenty years, through the flood, does not doubt its truth, and yet, when the hundred and twenty years have almost expired, marries and begets children. He might rather have thought: If the human race is to perish, why should I marry? Why should I beget sons? If I have refrained these many years, I shall do so henceforth. But Noah does not do this; rather, after making known God's purpose respecting the world's destruction, he obeys God, who calls him to matrimony, and believes God that, though the whole world may perish, yet he with his children shall be saved. An illustrious faith is this and worthy of our consideration.
98. There was in him first that general faith, in common with the patriarchs, concerning the seed which was to bruise the head of the serpent. He possessed also the singular virtue of holding fast to this faith in the midst of such a multitude of offenses, and not departing from Jehovah. Then, to this general faith he added the other, special faith, that he believed God as regards both the threatened destruction of the rest of the world and the salvation promised to Noah himself and his sons. Beyond a doubt, to this faith his grandfather Methuselah and his father Lamech earnestly incited him; for it was as difficult to so believe as it was for the Virgin Mary to believe that none but herself was to be the mother of the Son of God.