Adam Clarke

But he that is spiritual judgeth all things - He who has the mind of Christ discerns and judges of all things spiritual: yet he himself is not discerned by the mere animal man. Some suppose that the word ανακρινεται should be understood thus: He examines, scrutinizes, convinces, reproves, which it appears to mean in Co1 14:24; and they read the verse thus: The spiritual man - the well-taught Christian, convinces, i.e. can easily convict, all men, (παντα, accusing), every animal man, of error and vice; yet he himself is convicted of no man; his mind is enlightened, and his life is holy; and therefore the animal man cannot convict him of sin. This is a good sense, but the first appears the most natural. See Pearce and Rosenmuller.