the sons of God saw that the daughters of man were attractive. And they took as their wives any they chose.
2. That they were fair . Moses does not deem it worthy of condemnation that regard was had to beauty, in the choice of wives; but that mere lust reigned. For marriage is a thing too sacred to allow that men should be induced to it by the lust of the eyes.
For the glory of God's justice, and for warning to a wicked world, before the history of the ruin of the old world, we have a full account of its degeneracy, its apostasy from God and rebellion against him. The destroying of it was an act, not of an absolute sovereignty, but of necessary justice, for the maintaining of the honour of God's government.
Commenting on Genesis 6:1-2
That the sons of God saw the daughters of men, that they were fair,.... Or "good" (k), not in a moral but natural sense; goodly to look upon, of a beautiful aspect; and they looked upon, and only regarded their external beauty, and lusted after them: those "sons of God" were not angels either good or bad, as many have thought, since they are incorporeal...