1 Corinthians 12:12, 15-20, 27

For just as the body is one and yet has many parts, and all the parts, though many, form [only] one body, so it is with Christ.

If the foot says, “Because I am not a hand, I am not a part of the body,” is it not on the contrary still a part of the body? If the ear says, “Because I am not an eye, I am not a part of the body,” is it not on the contrary still a part of the body? If the whole body were an eye, where would the hearing be? If the whole [body] were an ear, where would the sense of smell be? But now [as things really are], God has placed and arranged the parts in the body, each one of them, just as He willed and saw fit [with the best balance of function]. If they all were a single organ, where would [the rest of] the body be? But now [as things really are] there are many parts [different limbs and organs], but a single body.

Now you [collectively] are Christ’s body, and individually [you are] members of it [each with his own special purpose and function].