And if all were one member - If there were nothing but an eye, an ear, or a limb, there would be no body The idea which this seems intended to illustrate is, that if there was not variety of talent and endowment in the church, the church could not itself exist. If, for example, there were nothing but apostles, or prophets, or teachers; if there were none but those who spoke with tongues or could interpret them, the church could not exist. A variety of talents and attainments in their proper places is as useful as are the various members of the human body.

And if they were all one member,.... As all eye, or all ear, or all hand, or all foot:

where were the body? where would be the body? it would not be a body consisting of such proper and suitable members, as now it is: so if the community of the saints were either all ministers, or all hearers, &c. there would be no body, consisting of different persons, to receive any benefit or usefulness from either; the church of Christ would not be that uniform, useful, and consistent community it is.

And if they were all one member, where were the body?

12:13-20 For in one Spirit were we all baptized into one body. For by means of one spirit we were all baptized into one body (Meyer). Rather, moved by one spirit acting through the apostles and evangelists, we were all baptized into one body, whether Jews or Gentiles, bond or free. The idea is that though diverse in race and condition, all have been made parts of one body by baptism, and that this had all been done under the direction of one spirit. All, too, receiving it as a gift, drank of the same spirit. Hence, if special and extraordinary spiritual gifts were imparted to the members of this body, these would be due to one spirit.

19. where were the body-which, by its very idea, "hath many members" (1Co 12:12, 14), [Alford].

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.