Romans 2:25-29

Paul’s entire argument culminates in addressing circumcision - the outward reflection of being keepers of the law, or being God’s covenant people. This argument would've ruffled some feathers, but Paul shifts the focus of the Jewish people to an INWARD matter. Now circumcision becomes an inward reality, not of some outward sign. Paul's argument shows that it's easier to be an outward Christian because that doesn't require heart change.