“And the father of circumcision to them who are not of the circumcision only, but who also walk in the steps of that faith of our father Abraham, which he had being yet uncircumcised.”
King James Version (KJV)
4:12 And the father of the circumcision - Of those who are circumcised, and believe as Abraham did. To those who believe not, Abraham is not a father, neither are they his seed.
Ro 4:12 The father of circumcision. The circumcision described in Ro 2:29. Abraham is the "great father", the father, not of the circumcision only, but of all who have such faith as he had before he was circumcised. When Abraham was "counted righteous through faith", there was no difference between Jew and Gentile. Christianity, by its revelation of "righteousness through faith", leads back to the same condition.