1 Corinthians 12:12-21  NAS

For even as the body is one and yet has many members, and all the members of the body, though they are many, are one body, so also is Christ.  For by one Spirit we were all baptized into one body, whether Jews or Greeks, whether slaves or free, and we were all made to drink of one Spirit.

For the body is not one member, but many.  If the foot says, "Because I am not a hand, I am not a part of the body," it is not for this reason any the less a part of the body.  And if the ear says, "Because I am not an eye, I am not a part of the body," it is not for this reason any the less a part of the body.  If the whole body were an eye, where would the hearing be?  If the whole were hearing, where would the sense of smell be?  But now God has placed the members, each one of them, in the body, just as He desired.  If they were all one member, where would the body be?  But now there 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."