“Now there are diversities of gifts, but the same Spirit. And there are differences of administrations, but the same Lord. And there are diversities of operations, but it is the same God which worketh all in all. …
For as the body is one, and hath many members, and all the members of that one body, being many, are one body: so also is Christ. For by one Spirit are we all baptized into one body, whether we be Jews or Gentiles, whether we be bond or free; and have been all made to drink into one Spirit. For the body is not one member, but many. If the foot shall say, Because I am not the hand, I am not of the body; is it therefore not of the body? And if the ear shall say, Because I am not the eye, I am not of the body; is it therefore not of the body? If the whole body were an eye, where were the hearing? If the whole were hearing, where were the smelling? But now hath God set the members every one of them in the body, as it hath pleased him. And if they were all one member, where were the body? But now are they many members, yet but one body. And the eye cannot say unto the hand, I have no need of thee: nor again the head to the feet, I have no need of you. Nay, much more those members of the body, which seem to be more feeble, are necessary: And those members of the body, which we think to be less honourable, upon these we bestow more abundant honour; and our uncomely parts have more abundant comeliness. For our comely parts have no need: but God hath tempered the body together, having given more abundant honour to that part which lacked: That there should be no schism in the body; but that the members should have the same care one for another. And whether one member suffer, all the members suffer with it; or one member be honoured, all the members rejoice with it. Now ye are the body of Christ, and members in particular” (I Corinthians 12:4–6, 12–27).
“For ye are all the children of God by faith in Christ Jesus. For as many of you as have been baptized into Christ have put on Christ. There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus. And if ye be Christ’s, then are ye Abraham’s seed, and heirs according to the promise” (Galatians 3:26–29).
(2.) That this privilege of being the children of God, and of being by baptism devoted to Christ, is now enjoyed in common by all real Christians. The law indeed made a difference between Jew and Greek, giving the Jews on many accounts the pre-eminence: that also made a difference between bond and free, master and servant, and between male and female, the males being circumcised. But it is not so now; they all stand on the same level, and are all one in Christ Jesus; as the one is not accepted on the account of any national or personal advantages he may enjoy above the other, so neither is the other rejected for the want of them; but all who sincerely believe on Christ, of what nation, or sex, or condition, soever they be, are accepted of him, and become the children of God through faith in him.
From Matthew Henry commentary