1 Corinthians 12:12

For as the body is one, and hath many members, and all the members of the body, being many, are one body; so also is Christ.

'For' -'The "for" with which this sentence begins indicates that what follows is intended to offer further explanation of the point made in vv. 4-11.' (Fee pp. 601-602)

'as the body is one' -essential unity in the body doesn't demand uniformity in function or the exact same area of service for all members.

'so also is Christ' -i.e. the body of Christ, the Church. (1 Corinthians 12:27; Romans 12:5)

'No one regards the body as divided (or intended to be divided) because it has many different parts (fingers, feet, ears). As. body it cannot be all one member.' (McGuiggan p. 171)

'The unity of the Church is not that of inorganic nature, --a monotonous aggregation of similars, as in..a heap of stones; it is the oneness of. living organism..Without "many members"..there would be no body at all.' (Gr. Ex. N.T. p. 889)