We tend to think of the soul as the eternal part of a person, as opposed to his temporal part:
Matthew 10:28 (NET)
Do not be afraid of those who kill the body but cannot kill the soul. Instead, fear the one who is able to destroy both soul and body in hell.
The explanation is to be found in this Free Grace article.
As a matter of fact,the Greek word psyche,here translated soul,has within its fields of meaning both life and person (see The GES News,Dec 91,p 2).
Also see here.
For example,the Lord Jesus said,"The Son of Man did not come to be served,but to serve,and to give His life [Gk psyche] a ransom for many" (Matt 20:28). Clearly Jesus Christ did not give up His eternal soul.
The article was written to refute the view that good works saved the believer's soul.
James 1:21 NET So put away all filth and evil excess and humbly welcome the message implanted within you, which is able to save your souls.
Wilkins, author of the article, wished to show that "save your soul" could mean "preserve your life".
The categories to differentiate between are spirit and soul . Some explain the first as what you have, the last as what you are. IOW, God could reward you for having a beautiful soul, character, but not for having a long life (long being the desirable quality in generic lives), since it is what He Himself gives.
Similarly, the mind is what He gives, but the soul is what you make of Life, when used to mean person. It could also be what God preserves, when used to mean life opportunity, permission to continue living.