When men began to increase in number on the earth and daughters were born to them, the sons of God saw that the daughters of men were beautiful, and they married any of them they chose.
Then the LORD said, “My Spirit will not contend with man forever, for he is mortal ; his days will be a hundred and twenty years.” The Nephilim were on the earth in those days—and also afterward—when the sons of God went to the daughters of men and had children by them. They were the heroes of old, men of renown.
The LORD saw how great man’s wickedness on the earth had become, and that every inclination of the thoughts of his heart was only evil all the time. The LORD was grieved that he had made man on the earth, and his heart was filled with pain. So the LORD said, “I will wipe mankind, whom I have created, from the face of the earth—men and animals, and creatures that move along the ground, and birds of the air—for I am grieved that I have made them.”
Genesis 6 : 1 – 7 (New International Version)
“The most remarkable thing concerning the old world, is the destroying of it by the deluge, or flood.
We are told of the abounding iniquity of that wicked world: God’s just wrath, and his holy resolution to punish it. In all ages there has been a peculiar curse of God upon marriages between professors of true religion and its avowed enemies. The evil example of the ungodly party corrupts or greatly hurts the other.
Family religion is put an end to, and the children are trained up according to the worldly maxims of that parent who is without the fear of God. If we profess to be the sons and daughters of the Lord Almighty, we must not marry without his consent.
He will never give his blessing, if we prefer beauty, wit, wealth, or worldly honours, to faith and holiness. The Spirit of God strove with men, by sending Enoch, Noah, and perhaps others, to preach to them; by waiting to be gracious, notwithstanding their rebellions; and by exciting alarm and convictions in their consciences.
But the Lord declared that his Spirit should not thus strive with men always; he would leave them to be hardened in sin, and ripened for destruction. This he determined on, because man was flesh: not only frail and feeble, but carnal and depraved; having misused the noble powers of his soul to gratify his corrupt inclinations.” #
#Taken From Matthew Henry’s Concise Commentary.