'But now they are many members, but one body. And the eye cannot say to the hand, "I have no need of you", or again the head to the feet, "I have no need of you".
So the body being made up of many differing members, each has to recognise that all are necessary for the whole. Behind the statement, 'I have no need of you', is almost certainly the attitude of some of the Corinthians who saw themselves as spiritually superior and in no need of others. Sometimes Christians can gather in small groups thinking themselves to be superior, but they should then recollect their great need for the whole of Christ's body, of which they are a part, (and if separated, a disabled part).
Note again in all this that the head, eyes and ears are simply members of the body. There is no thought of Christ as the head. In 1 Corinthians that is a different concept (1 Corinthians 11:3), not connected with the body. It may be that the eye and head are to be seen here as superior members, with the idea in mind of those Corinthians who had inflated opinions about themselves, and looked down on the lesser members and saw them as unnecessary. If so Paul is bringing home to them how essential the other members are. We would not want to be without hand or foot.