12:12-26 Christ and his church form one body, as Head and members. Christians become members of this body by baptism. The outward rite is of Divine institution; it is a sign of the new birth, and is called therefore the washing of regeneration, Tit 3:5. But it is by the Spirit, only by the renewing of the Holy Ghost, that we are made members of Christ's body. And by communion with Christ at the Lord's supper, we are strengthened, not by drinking the wine, but by drinking into one Spirit. Each member has its form, place, and use. The meanest makes a part of the body. There must be a distinction of members in the body. So Christ's members have different powers and different places. We should do the duties of our own place, and not murmur, or quarrel with others. All the members of the body are useful and necessary to each other. Nor is there a member of the body of Christ, but may and ought to be useful to fellow-members. As in the natural body of man, the members should be closely united by the strongest bonds of love; the good of the whole should be the object of all. All Christians are dependent one upon another; each is to expect and receive help from the rest. Let us then have more of the spirit of union in our religion.If the foot shall say ... - The same figure and illustration which Paul here uses occurs also in pagan writers. It occurs in the apologue which was used by Menenius Agrippa, as related by Livy (lib. 2: cap. 32), in which he attempted to repress a rebellion which had been excited against the nobles and senators, as useless and cumbersome to the state. Menenius, in order to show the folly of this, represents the different members of the body as conspiring against the stomach, as being inactive, and as refusing to labor, and consuming everything. The consequence of the conspiracy which the feet, and hands, and mouth entered into, was a universal wasting away of the whole frame for lack of the nutriment which would have been supplied from the stomach. Thus, he argued it would be by the conspiracy against the nobles, as being inactive, and as consuming all things. The representation had the desired effect, and quelled the rebellion. The same figure is used also by Aesop. The idea here is, that as the foot and the ear could not pretend that they were not parts of the body, and even not important, because they were not the eye, etc.; that is, were not more honorable parts of the body; so no Christian, however humble his endowments, could pretend that he was useless because he was not more highly gifted and did not occupy a more elevated rank. 15. The humbler members ought not to disparage themselves, or to be disparaged by others more noble (1Co 12:21, 22).

foot … hand—The humble speaks of the more honorable member which most nearly resembles itself: so the "ear" of the "eye" (the nobler and more commanding member, Nu 10:31), (1Co 12:16). As in life each compares himself with those whom he approaches nearest in gifts, not those far superior. The foot and hand represent men of active life; the ear and eye, those of contemplative life.

See Poole on "1 Corinthians 12:15"

And if the ear shall say,.... The organ that receives sounds, and can distinguish them, and in which member is placed the sense of hearing; and may design such as are hearers of the word of God, not merely externally, but internally; who hear so as to love, savour, and relish it; so as to understand and believe it, and to act in compliance with it; and distinguish it for themselves, though they may not be able to give a distinct account of it to others, or instruct others in it:

because I am not the eye: the organ of seeing, in which is seated the visive faculty, and which receives light, and uses it for the good of the body, whose superintendent it is; and may be expressive of the ministers of the Gospel, who are that to the church, as eyes are to the body; they are the light of the world, have a clear insight into the doctrines of the Gospel, and communicate their light to others; they are set in the highest place in the church, and as watchmen and overseers there, to instruct; guide, and direct the members of it:

I am not of the body, is it therefore not of the body? it certainly is; and so such as are only hearers of the Gospel, being affectionate, believing, understanding and fruitful hearers; though they have not such large knowledge and clear light, so as to be capable of overseeing and instructing others, yet are true and useful members of the church, are highly respected by Christ the head, and to be had in esteem by their fellow members, who may be superior to them.

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?