1 Corinthians 12:12-18

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. For by one [Holy] Spirit we were all baptized into one body, [spiritually transformed—united together] whether Jews or Greeks (Gentiles), slaves or free, and we were all made to drink of one [Holy] Spirit [since the same Holy Spirit fills each life]. [Rom 3:22; Gal 3:28] For the [human] body does not consist of one part, but of many [limbs and organs]. 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].