Barnes New Testament Notes

Verse 23. But before faith came. That is, the system of salvation by faith in the Lord Jesus. Faith here denotes the Christian religion, because faith is its distinguishing characteristic.

We were kept under the law. We, who were sinners; we, who have violated the law. It is a general truth, that before the gospel was introduced, men were under the condemning sentence of the law.

Shut up unto the faith. Enclosed by the law with reference to the full and glorious revelation of a system of salvation by faith. The design and tendency of the law was to shut us up to that as the only method of salvation. All other means failed. The law condemned every other mode, and the law condemned all who attempted to be justified in any other way. Man, therefore, was shut up to that as his last hope; and could look only to that for any possible prospect of salvation. The word which in this verse is rendered "were kept," efrouroumeya, usually means to guard or watch, as in a castle, or as prisoners are guarded; and though the word should not be pressed too far in the interpretation, yet it implies that there was a rigid scrutiny observed; that the law guarded: them; that there was no way of escape; and that they were shut up, as prisoners under sentence of death, to the only hope, which was that of pardon.