The saying is faithful and worthy of all acceptance, that Christ Jesus came into the world to save sinners; of whom I am chief.

 Timothy was the child of a mixed marriage; his mother was a Jewess, and his father a Greek ( Acts 16:1). Paul circumcised him. It was not that Paul was a slave of the law, or that he saw in circumcision any special virtue; but he knew well that if Timothy was to work amongst the Jews, there would be an initial prejudice against him if he was uncircumcised, and so he took this step as a practical measure to increase Timothy's usefulness as an evangelist. 