1 Corinthians 12:18-22

But as it is, God has placed each one of the parts in the body just like he wanted. If all were one and the same body part, what would happen to the body? But as it is, there are many parts but one body. So the eye can’t say to the hand, “I don’t need you,” or in turn, the head can’t say to the feet, “I don’t need you.” Instead, the parts of the body that people think are the weakest are the most necessary.