It's important to distinguish the soul from the spirit, or will, because the will or the heart or the spirit is the executive center of the self.
Dallas WillardWe see that the soul is the deepest and the most vital part of the person as a whole. It is often treated as the person, and we actually do this when we talk about "saving our soul."
Dallas WillardHuman beings are at their core defined by what they worship rather than primarily by what they think, know, or believe. That is bound up with the central Augustinian claim that we are what we love.
Dallas WillardThere is knowledge of God and the spiritual nature of man, as well as other types of reality..., that are not reducible to the world dealt with by the so-called "natural" sciences. The idea that knowledge - and, of course, reality - is limited to that world is the single most destructive idea on the stage of life today.
Dallas Willard