John Calvin on 1 Corinthians 12:29-30

29. Are all Apostles? It may indeed have happened, that one individual was endowed with many gifts, and sustained two of the offices which he has enumerated; nor was there in this any inconsistency. Paul’s object, however, is to show in the first place, that no one has such a fullness in everything as to have a sufficiency within himself, and not require the aid of others; and secondly, that offices as well as gifts are distributed in such a manner that no one member constitutes the whole body, but each contributing his portion to the common advantage, they then altogether constitute an entire and perfect body. For Paul means here to take away every occasion of proud boasting, base envyings, haughtiness, and contempt of the brethren, malignity, ambition, and everything of that nature.