Charles Spurgeon Commentary Galatians 3:21-23

"Is the law then against the promises of God? God forbid: for if there had been a law given which could make alive, verily righteousness would have been of the law. But the scriptures shut up all things under sin, that the promise by faith in Jesus Christ might be given to them that believe. But before faith came, we were kept in ward under the law, shut up unto the faith which should afterwards be revealed." — Galatians 3:21-23 (ASV)

Tell me, you that desire to be under the law, do you not hear the law? For it is written, that Abraham had two sons, the one by a bondmaid, the other by a free woman. But he who was of the bondwoman was born after the flesh; –

By Abraham's own strength; –