Acts 15:9

And put no difference between us and them
Neither in the extraordinary gifts, nor special grace, of the Spirit; giving them the same graces of faith, hope, and love, admitting to the same privileges and immunities of the house of God, and giving them a right and title to the same inheritance of the saints in light, though the one were circumcised, and the other were not. God puts no difference as to matters of religion under the Gospel dispensation between Jews and Gentiles, neither on account of Abraham's seed, or of circumcision, or of the ceremonial law, or of national adoption; nor would he have any made with respect to conversation, civil or religious; all which Peter knew full well: nor has he made any difference in his eternal choice of persons to eternal salvation, on any of the above accounts, having ordained Gentiles to eternal life as Jews, who in consequence of it believe in Christ; nor in redemption, Christ having redeemed by his blood men out of every kindred, tongue, people, and nation; nor in the effectual calling, for they that were called in the first times of the Gospel, were not of the Jews only, but of the Gentiles also, to whom the Gospel was alike sent, and made effectual to saving purposes: these shared in the same blessings of pardon, justification, and adoption; their sins were forgiven through the same blood, their persons were justified by the same righteousness, and they were taken into the same family, and were no more strangers and foreigners, but fellow citizens of the saints, and of the household of God; having the same access to God, being built on the same foundation, enjoying the same privileges, and having the same hope of eternal glory.

Purifying their hearts by faith;
which was done by implanting faith in them, and leading that faith to the blood of Christ, which cleanses from all sin, original and actual, with which men are defiled; for faith has not this efficacy in itself, but as it has to do with the blood of Jesus: and this spiritual purification being what answered to circumcision, made that unnecessary; for this is the circumcision of the heart, of which the other was only typical. The hearts of men are filthy, and need purifying; they are originally polluted with sin; this is the case of all men; and this defilement reaches to all the members of the body, and the faculties of the soul; and especially the heart is the seat of this impurity, which God only can cleanse: he promises to do it, and does do it; and he only can do it, men cannot; for though, they are exhorted to it, in order to make them sensible of their pollution, and their need of cleansing, that they may apply where it is to be had, yet it is not in their power to effect it; to make a clean heart is a creation work, which is peculiar to God: the heart cannot be purified, neither by ceremonial ablutions, nor by works of moral righteousness, nor by humiliations and tears, nor by submission to Gospel ordinances, as water baptism, but only by the grace of God, and the blood of Christ; which the Spirit of God sprinkles upon the heart, and which faith looks to and deals with, and so it is freed from an evil conscience; and this blessing the believing Gentiles enjoyed in common with the believing Jews.