I believe God created all there was to be created in six days.
I believe He created man in his own image and likeness, part of which is a tri-partite being. His image and likeness was marred by the Fall but is partially restored by salvation, especially as we become more and more conformed to the image of Christ. It will never be completely restored until the resurrection.
It is evident that we have a spirit. The unsaved use their spirits to communicate with demons. They can become demon-possessed. There is the entire field of what is known in the secular field of the "paranormal." The unsaved man definitely has a spirit and often it is given over to wickedness.
Ephesians 2:2 Wherein in time past ye walked according to the course of this world, according to the prince of the power of the air, the spirit that now worketh in the children of disobedience:
ONLY the Holy Spirit can breath the life of God into sinners, and once he has come into us, that makes us alive again to God, fors its now Christ in us, the hope of glory!