1 Corinthians 12:17-20

17If 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?

18But 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].

19If they all were a single organ, where would [the rest of] the body be?

20But now [as things really are] there are many parts [different limbs and organs], but a single body.