And he received the sign of circumcision, a seal of the righteousness of the faith which he had yet being uncircumcised: that he might be the father of all them that believe, though they be not circumcised; that righteousness might be imputed unto them also:
All Commentaries on Romans 4:11 Go To Romans 4
Severian of Gabala
AD 425
Circumcision was given for these three reasons: First, to be a sign of faith; second, to mark out the race of Abraham, and third, to be a sign and symbol of good and wise behavior. It was not given in order to produce righteousness but as a sign and seal of the righteousness which was Abraham’s by faith. .