For the Son of God, Jesus Christ, who was preached among you by us, even by me and Silvanus and Timotheus, was not yea and nay, but in him was yea.
Ver. 19. For the Son of God] What is that to the purpose? Thus: if the gospel that Paul preached be not yea and nay, then neither are Paul's promises yea and nay. This is his intendment, else his inference is nothing. And by that which follows, it reacheth all Christians; q.d. Look what a Christian doth promise, he is bound by the earnest penny of God's Spirit to perform. He dares no more alter his words to the discredit of his profession than the Spirit of God can lie. (Mr Cotton on the Seven Vials.)