Commentaries:
Jamieson, Fausset, and Brown
For circumcision—that is, One's being within the covenant of which circumcision was the outward sign and seal.
verily profiteth, if thou keep the law—if the inward reality correspond to the outward sign.
but if, etc.—that is, "Otherwise, thou art no better than the uncircumcised heathen."
Other Jamieson, Fausset, and Brown entries containing Romans 2:26:
Philippians 3:3
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