I have heard many times among students of Christian Science that Soul is the synonym for God that is the most difficult one for them to understand.
Isn’t this belief simply the carnal mind, the enemy of God (see Romans 8:7), trying to hide from our understanding one of the most important things for us to understand? There is really nothing vague or mysterious about Soul. Soul is, in fact, quite understandable and quite lovable.
Soul is the name for God that is tied most closely to spiritual identity, which we each have eternally. Individual spiritual identity is how God, Soul, pours light and truth on all creation. In human experience, spiritual identity is how divine light and truth flood the human scene. Our spiritual identity is the reflection of Soul; it is like a golden orifice for God’s goodness to be seen and felt, so we must keep that orifice unclogged.