1 Corinthians 12:26

'And whether one member suffers, all the members suffer with it; or one member is honoured, all the members rejoice with it.'

Indeed the literal body is so made one that when one member of a literal body is in pain the whole body is aware of it and suffers, for it affects the whole. When we have a raging toothache, for example, it affects the functioning of the whole body. In the same way Christ's body should be so one that when a member of Christ suffers, the whole of Christ's body should suffer with him, and indeed his suffering does, like a toothache, affect the functioning of the whole body, even if only in a small way. The body cannot feel whole while one member is in pain. And the same applies when one member is honoured. The whole body is (and should be) so united that it rejoices in his being honoured, for they share in his honour. Such should be the oneness of Christ's body in its divers manifestations.