1 Corinthians 12:30 Meaning

28And God hath set some in the church, first apostles, secondarily prophets, thirdly teachers, after that miracles, then gifts of healings, helps, governments, diversities of tongues.

29Are all apostles? are all prophets? are all teachers? are all workers of miracles?

30Have all the gifts of healing? do all speak with tongues? do all interpret?

31But covet earnestly the best gifts: and yet shew I unto you a more excellent way.