1 Corinthians 2:14

By the "natural man" the apostle means man as he is born and grows up, without being born of God or the Holy Spirit given to him. He may be very learned, scientific, intellectual and refined. Still, until the Spirit gives him life, he is the natural man. He does not receive the things of the Spirit of God, for to him they are folly. Nor can he learn them and make them his own, grasping their truth, because they are spiritually discerned. He does not have the Spirit of God, since he does not believe in Christ.

The adjective ψυχικός, animal, appears in 1 Corinthians 2:14; 15:44, 46; and James 3:15. Its meaning may present some difficulty when applied either to a man's moral condition or to his body. We think it well, then, to note what the word points to in these passages. It points to that which, like the first Adam, lives by having a soul, and not by the mighty energy of the Holy Spirit.

A blind man does not know for himself what the beautiful colours of a flower are. He has no sense of sight to perceive this loveliness of God's handiwork. Our power for discerning divine things lies in having the Spirit of God within us, who is like eyes to our souls. … The simplest believer on earth, with the Spirit of God within him, knows more of God's things than the wisest of men without the Spirit. The natural man may sit in judgment on God's Word and God's character. But to the Christian his pride is like that of a council of deaf men giving their opinion on harmony.

He is not speaking of any special class of men. He means man in his unconverted state, man without the Spirit of God… it is man in nature, whether he is a learned philosopher or an ignorant clown. He cannot know the things of the Spirit of God. How then can he form or give a judgement about the word of God?

In the Spirit's estimate there is no place for the large group who in practice waver between two opinions. Not to receive the witness of God is to reject it. … Knowing the gospel, and even agreeing with its truth in the mind, is not the same thing as receiving it. … A religious profession may be quite sincere, and yet the person making it is still a natural man.

Man's thoughts differ so far from God's that man can see nothing but foolishness — even in the most wonderful display of God's saving power. No wonder. If man is to know God at all, he must know Him morally. But men's consciences shrink from looking at God in His moral character… We must know God, not as fallen man can understand Him, but as He has revealed Himself. Only the soul taught by the Spirit can grasp this.

We do well to remember that it is the "spiritual", not simply the one who has the Spirit, who discerns all things. A man must, of course, have the Spirit to be spiritual. But being spiritual means a condition in which a man is under the control of the Spirit. Such people discern all things, yet they themselves are discerned by no one.