"And daughters were born unto them." A snare that was often used in the hand of the devil, to intangle withal the church of God; yea, and doth so usually speed, that it hath often been counted by him as infallible; so that this is the doctrine of his prophet Balaam, and it prevailed, when all the engines of hell beside were prevented. "The people began to commit whoredom with the daughters of Moab" (Num 25:1,2). It may be this child of hell, in this his advice to Balak looked back to the daughters of Cain, and calling to remembrance how of old they intangled the church, advertised him to put the same into practice again (Rev 2:14).
Ver. 2. "That the sons of God saw the daughters of men, that they were fair; and they took them wives of all which they chose."
This was the way then of the sons of Cain, to let their fair daughters be shewed to the sons of God (Pro 22:14). For it seems all other their wiles and devices were not able to bring the church and the world together, and to make them live as in one communion. These to the church were such, whose hearts were snares and nets, and whose hands were bands to intangle and hold them from observing the laws and judgments of God (Eccl 7:26).
"And they took them wives." First their eye saw them, and then their heart lusted after them. Thus the devil deceived the woman, and by this means perished cursed Achan. "And Achan answered Joshua, and said, Indeed I have sinned against the Lord, and thus and thus have I done: When I saw among the spoils a goodly Babylonish garment," &c., "then I coveted them" (Josh 7:20,21).
Note therefore, that it is not good to behold with the eye that which God hath forbid us to touch with our hand. "I made a covenant with mine eyes," saith Job (Job 30:1). And again, if at unawares a thing was cast before him, the beholding of which was of an intangling nature, he forthwith would hold back his heart as with a bridle, lest the design of hell should be effected upon him (v 7).
Crush sin then in the conception, lest it bring forth death in thy soul.
Ver. 3. "And the Lord said, My Spirit shall not always strive with man, for that he also is flesh: yet his days shall be an hundred and twenty years."
By these words is aggravated the sin of the church, that she would attempt to close with, and hold a sinful communion, against the dissuasions of the Spirit of God.
"My Spirit shall not always strive." To wit, my Spirit in Noah, for he was the only preacher of righteousness to the church in those backsliding times.
By this then, I find, that the doctrine of Noah, was, To declare against a sinful communion, or to command the church, in the name of God, that she still maintain a separation from the cursed children of Cain: As he said to the prophet Jeremiah, If thou separate the precious from the vile, "thou shalt be as my mouth" (15:19).