The Natural, Carnal, and Spiritual Man The Natural Man The natural man is one who lives without God - who lives his/her life "in the flesh". The "flesh" in this sense means the sinful (lower) nature- the nature which became a part of man after the fall (sin) of Adam and Eve. Now, this sinful nature is passed down to all men. The illustration shows that the door of the spirit (that part of man that relates to God) is closed. the door of the flesh is open. The natural man must be born again - his spirit made alive. 1 Corinthians 2:14 But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned. Galatians 5:19-21 Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness, 20 Idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies, 21 Envyings, murde...