But the natural man receives not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.
All Commentaries on 1 Corinthians 2:14 Go To 1 Corinthians 2
Irenaeus of Lyons
AD 202
Knowledge, then, consists in the understanding of Christ, which Paul terms the wisdom of God hidden in a mystery, which "the natural man receiveth not"