He does this in the first place, because all the men of that age were wicked: secondly, he is here imposing a law upon the will, because, to an anxious follower of virtue, virtue itself stands in the place of a real generation, if indeed men are the means of the generation of men, but the virtues of minds. And on this account it is that he says, he was a just man, perfect, and one who pleased God; but justice, and perfection, and grace before God, are the greatest of virtues.
What was the meaning of Moses when he says, "And all the earth was corrupt in the sight of God, and the earth was filled with iniquity?" (Genesis 6:11).