Man was created in GOD's image. Does that mean that GOD looks like man? NO, GOD is a Spirit. HOWEVER, God has over the course of time revealed HIMSELF to be a perfect union of three perfect beings as one essence "GOD"--- also called the GODHEAD. Those three beings are God the FATHER, God the SON and God the HOLY SPIRIT (also know as the COMFORTER).
GOD then designs Man as triune. Man is Body, Soul, and Spirit. Actually, it maybe better to say that man is Soul, Spirit, and Body. Presently, the body is that part that is material/visible. The body now is in the process of decay and dies due to sin. Our Soul is that part that possess our personality and is eternal. Our spirit is our motivation ---- what drives us to do what we do, whether for good or for evil. When sin entered into the world, evil became the motivating force. Satan took charge of Adam and Eve, and they spiritually died immediately ---- separated from GOD. It was only through GOD's promise to crush the serpent's head that GOD was making a promise of redemption to reclaim the soul of man who was now under bondage to his spirit and confined to a dying body.
Unlike fallen man, JESUS had a body, soul and spirit that were entirely without sin and possessed entirely of GOD. It is also interesting to note that JESUS/Messiah/CHRIST is the being of the GODHEAD that apparently appears over and over throughout the Old Testament. It is HE who assumes a "material" form to Adam, Abraham, Jacob, etc., and becomes a baby in a manger in Bethlehem of Judea. And when JESUS want to the cross, HE wasn't killed, HE allowed HIS death to occur. JESUS said, "Father, into Thy hands do I commend My spirit." He GAVE up the ghost and later Jesus reclaimed it and arose from the dead.
When an individual becomes saved/born-again, his spirit come once again under GOD's motivation: however, because sin is still in charge over the earth, a saved individual can drift back and forth between what motivates him to a degree. BUT in fact a save individual's soul is now under the protection of the HOLY SPIRIT, and when the body dies, such an individual's soul goes to be with the LORD. It will remain there until GOD reunites it with a recreated perfect body, and the HOLY SPIRIT totally indwells that individual forever.