We live eternally as a spirit, we have a soul, and we dwell in a body. The soul is of three parts—the mind, the will, and the emotion. Before we became new creatures, we have been living based on the pattern of this world, I. E we live our life based on what we THINK is right. BUT the moment we became new creatures our Spirit Man received Eternal Life (The life of God).
The Spirit of man is that part of man that is born again not our soul or body!
James 1:21 AMP “So get rid of all uncleanness and the rampant outgrowth of wickedness, and in a humble (gentle, modest) spirit receive and welcome the Word which implanted and rooted [in your hearts] contains the power to save your souls.”
Romans 12:2 NIV “Do not conform to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God’s will is—his good, pleasing and perfect will.”
To save our soul, we need to renew our mind consistently with the word of God. When we renew our mind with the word of God, we think inline with what God’s word says (we fill our mind with the will of God). We will then be able prove what is good, and acceptable, and perfect, will of God.