15 If the foot should say, “Because I am not a hand, I am not of the body,” is it therefore not of the body?
16 And if the ear should say, “Because I am not an eye, I am not of the body,” is it therefore not of the body?
17 If the whole body were an eye, where would be the hearing? If the whole were hearing, where would be the smelling?
18 But now God has set the members, each one of them, in the body just as He pleased.
19 And if they were all one member, where would the body be?
20 But now indeed there are many members, yet one body.
21 And the eye cannot say to the hand, “I have no need of you”; nor again the head to the feet, “I have no need of you.”
The point in verses 15-16 is that no member of the body should look down on his own function or covet the function of others.
Every one of them (v.18) — unity but not uniformity
Dissatisfaction with one’s place in the body is dissatisfaction with God’s plan and will (v.18).
The point in verse 21 is that there is no place for feeling superiority, only interdependence.