To bring us unto Christ.--The words "to bring us," it will be seen, are supplied. They may be retained, provided that the metaphor is not pressed to the extent of supposing that Christ represents the schoolmaster proper to whom the child is led by the pedagogue slave. The work of Christ as a Teacher is not what the Apostle has in mind. It is rather a higher kind of guardianship, which is to succeed that of the Law, and to which the Law hands over its pupil. Once brought within the guardianship of Christ, and so made a member of the Messianic kingdom, the Christian is justified by faith, he receives an amnesty for his past sins, and is accounted righteous before God. (See Epistle to the Romans, Excursus E: On the Doctrine of Justification by Faith and Imputed Righteousness.)
That we might be justified by faith; by Christ the object of faith, by his righteousness, which faith looks unto and receives, and not by the law and the works of it; the people of the Jews were in such a state under the law, and the law of that use unto them before the coming of Christ, as above represented, that it might be made manifest, be a clear point, and out of all dispute, that there is no such thing as justification by the law; for how could ever such a blessing be expected from it, when men were kept under it as under a military guard; when they were shut up in it as in a prison, and were treated by it as malefactors, convicted and condemned; and when they were under the discipline of it, as a rigid and severe schoolmaster? this being their case till Christ came, when it ceased to be all this to them, he being the end of it for righteousness, it became a thing self-evident, that justification is only by him and his righteousness, and so the end here mentioned was answered.