1 Corinthians 12:15
If the foot shall say, Because I am not the hand, I am not of the body; is it therefore not of the body?
Note 4 at 1Co 12:15: If we were given the choice of losing our eyesight, our hearing, or our ability to walk, most of us would have a hard time choosing. We'd probably say, "I don't want to do without any of them. They're all important." We should feel the same way about every member of the body of Christ (see note 14 at 1Co 12:27) and the gifts they have to contribute to the whole.
Paul was trying to get people to appreciate the gifts God has given them and to recognize that their part, even if they think it is insignificant, is vital. They should not be envious of others who have a more visible role. All born-again Christians have a place in the body of Christ and a gift to contribute, just like every part of the physical body.