'Circumcision' in the Bible

For indeed circumcision is of value if you practice the Law; but if you are a transgressor of the Law, your circumcision has become uncircumcision.

So if the uncircumcised man keeps the requirements of the Law, will not his uncircumcision be regarded as circumcision?

And he who is physically uncircumcised, if he keeps the Law, will he not judge you who though having the letter of the Law and circumcision are a transgressor of the Law?

For he is not a Jew who is one outwardly, nor is circumcision that which is outward in the flesh.

But he is a Jew who is one inwardly; and circumcision is that which is of the heart, by the Spirit, not by the letter; and his praise is not from men, but from God.

Then what advantage has the Jew? Or what is the benefit of circumcision?

and he received the sign of circumcision, a seal of the righteousness of the faith which he had while uncircumcised, so that he might be the father of all who believe without being circumcised, that righteousness might be credited to them,

and the father of circumcision to those who not only are of the circumcision, but who also follow in the steps of the faith of our father Abraham which he had while uncircumcised.

For I say that Christ has become a servant to the circumcision on behalf of the truth of God to confirm the promises given to the fathers,