Galatians 3:21

“Is the law then against the promises of God? etc..] If the law was added because of transgressions, and curses for them, and if the inheritance is not of it, but by promise, were it, it would not be by promise, then, says an objector, it is against the promises: these are contrary to one another, and God, in giving the one and the other, must contradict himself: to which it is replied, God forbid; a way of speaking the apostle uses, when he would express his abhorrence and detestation of anything, as here; for though the law and promises are distinct things, and have their separate uses, yet they are not contradictory to each other; the law has its use, and so have the promises; the promises…”

“"Is the law (which involves a mediator) against the promises of God (which are without a mediator, and rest on God alone and immediately)? God forbid." life--The law, as an externally prescribed rule, can never internally impart spiritual life to men naturally dead in sin, and change the disposition. If the law had been a law capable of giving life, "verily (in very reality, and not in the mere fancy of legalists) righteousness would have been by the law (for where life is, there righteousness, its condition, must also be)." But the law does not pretend to give life, and therefore not righteousness; so there is no opposition between the law and the promise. Righteousness can only come…”

“Is the law then against the promises of God? - Is the Law of Moses to be regarded as opposed to the promises made to Abraham? Does this follow from any view which can be taken of the subject? The object of the apostle in asking this question is, evidently, to take an opportunity to deny in the most positive manner that there can be any such clashing or contradiction. He shows, therefore, what was the design of the Law, and declares that the object was to further the plan contemplated in the promise made to Abraham. It was an auxiliary to that. It was as good as a law could be; and it was designed to prepare the way for the fulfillment of the promise made to Abraham. God forbid - It cannot…”

“Will it follow from hence that the law is against, opposite to, the promises of God? By no means. They are well consistent. But yet the law cannot give life, as the promise doth. If there had been a law which could have given life - Which could have entitled a sinner to life, God would have spared his own Son, and righteousness, or justification. with all the blessings consequent upon it, would have been by that law. Galatians 3:22”

“3:21-25 See Rom 7:7-13. 3:21 No conflict of purpose exists between law and promise, or between law and faith. Law partners with the promise in bringing people to faith in Christ. Law has its proper roles of declaring people prisoners of sin (3:19, 22) and of restraining sin (3:23-25). In Galatia, the Judaizers tried to convince Gentile Christians that the law could do something it was never intended to do—give . . . new life and make people right with God. God does these things on the basis of faith in his promise, which was fulfilled in Jesus Christ (see 3:22).”

“the law: Mat 5:17-20; Rom 3:31, Rom 7:7-13 God forbid: Gal 2:17; Rom 3:4, Rom 3:6 for: Gal 2:19, Gal 2:21; Rom 3:20 righteousness: Rom 3:21, Rom 3:22, Rom 9:31, Rom 10:3-6; Phi 3:6-9; Heb 11:7 Galatians 3:22”