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).
Noah therefore had a hard task, when he preached this doctrine among them: for this above all is hard to be borne, for by this he condemned the world.
The first great quarrel therefore that God had with his church, it was for their holding unwarrantable communion with others. The church should always "dwell alone, and not be reckoned among the nations" (Num 23:9). The church is "a chosen generation, a royal priesthood, an holy nation, a peculiar people" (1 Peter 2:9). Therefore the work of the church of God, is not to fall in with any sinful fellowship, or receive into their communion the ungodly world, but to shew forth the praises and virtues of him who hath called them out from among such communicants into his marvellous light.
"My Spirit shall not always strive." Hence note, that the people that shall continue to grieve the Spirit of God, and to resist the doctrine of Noah, they are appointed for heavy judgments. "Come out of her, my people, that ye be not partakers of her sins, and that ye receive not of her plagues" (Rev 18:4). This because those (finally impenitent) in Noah's time refused to do, therefore the wrath of God overtook them, and swept them off the face of the earth.
"Yet his days shall be an hundred and twenty years." Noah therefore began his preaching about the four hundred and fourscore year of his life, which continuing the space of sixscore more, it reached to the day that the flood came.
In which time doubtless his faith was sufficiently tried, both by the hard censures of the hypocrites of the church, and the open profane of the world, against whom he daily pronounced the judgments of God for maintaining their forbidden communion (Gen 3:15).