Acts 15:9

Put no difference between us and them. Accepted them just as he accepted us, and gave the Holy Spirit as a proof to us that he had accepted them.

Purifying their hearts by faith. The Jews held that Gentiles were unclean, but Peter declared that faith, the true circumcision, that of the heart, not of the body, purified them into fitness for the ordinances of Christ. Observe Peter's doctrine: not circumcision of the flesh, but the faith that leads to obedience cleanses from uncleanness.
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