1 Corinthians 12:24-26

while our more presentable parts do not require it. But God has combined the [whole] body, giving greater honor to that part which lacks it, so that there would be no division or discord in the body [that is, lack of adaptation of the parts to each other], but that the parts may have the same concern for one another. And if one member suffers, all the parts share the suffering; if one member is honored, all rejoice with it.