Galatians 3:22

But the scripture shut up all things under sin, that the promise by faith in Jesus Christ might be given to them that believe. [The apostle now undertakes to show the inferiority of the law to the gospel. For what purpose then, you ask, was the law? It was added by God for the purpose of revealing and manifesting to man his sinfulness, and was to exist only during the interim between the giving of the promise and the fulfillment of the promise by the coming of Christ (Galatians 2:18; Romans 5:13-20; Romans 7:7). It was not given directly by divine lips, as was the gospel, but through the intervention of angels (Deuteronomy 33:2; Hebrews 2:2); and it was not given personally, but through Moses, a mediator (Deuteronomy 5:5). Now, this mediatorship of Moses also argues the temporal nature of the law; for a mediator is no part of the personality of the one whom he represents: he is a different personality; but God is one personality, and can not, therefore, be properly represented by any other than himself. Such a mediatorship, therefore, must, in the very nature of the case, be but temporary. The men who represent God are mortal and pass away, but God is immutable and ever-abiding. His promises, therefore, stand on a different plane from anything which rests on human mediation. But some one will ask, if the law brings a curse, is it not antagonistic to the promises which bring a blessing? God forbid that we should think that the Almighty acts in so contrary a manner. There are two ways in which the law might antagonize the gospel. 1. If righteousness could have been obtained by it, it might have proved a rival way of life. But it is no such rival. 2. If it had destroyed life despite the gospel, it would have been contradictory to the gospel. But it merely shut men up as prisoners, doomed for their sins, that justification by faith in Jesus Christ might be given to all them that believe. Thus, instead of being antagonistic to the gospel, the law emphasized and revealed the blessedness of the gospel.]