'Rather' in the Bible

yet we know that a person is not justified by doing what the Law requires, but rather by the faithfulness of Jesus the Messiah. We, too, have believed in the Messiah Jesus so that we might be justified by the faithfulness of the Messiah and not by doing what the Law requires, for no human being will be justified by doing what the Law requires.

But now that you know God, or rather have been known by God, how can you turn back again to those powerless and bankrupt basic principles? Why do you want to become their slaves all over again?

For neither circumcision nor uncircumcision matters. Rather, what matters is being a new creation.