The threefold division of man

The text in 1 Corinthians 2: 14-15 has similarities with the Gnostic thought.
The greeks and in particular Aristotle and Plato used for their analyzes the triple division of the soul: reason, pasion and desire. Instead the Gnostics and Christians in general use the triple division of man: body, soul and spirit. That´s why in the Bible is talk about living according to the spirit and to live according to the flesh as in Romans 8:5 and in Romans 6:23.
The triple division of man is related with three types of person: the natural man in which prevails the body, the rational man in which prevais the soul, and the spiritual man in which prevails the spirit.
For the natural man the spiritual matters are foolishness to him, because he lacks of the spirit.
The natural and the spiritual man have oppose modes of discerning one is chaotic, unjust, destrutive: the other instead benevolent, edifyng,progressive. The rational man is the man in which the main characteristic is the variety of passions, is the man in a intermediate state between good and evil.
http://www.quintoevangelio.com.ar/en/articles/item/73-a-study-about-the-triple-division-of-man.html