Relationship to Kabbalah

The word "soul" can be used in various ways. As long as we know the underlying idea we will not be confused. Kabbalah uses the word "soul" as a comprehensive term with degrees within it.
http://en.wikipedia.org/wiki/Kabbalah#Overview

The Kabbalah posits that the human soul has three elements, the nefesh, ru'ach, and neshamah. The nefesh is found in all humans, and enters the physical body at birth. It is the source of one's physical and psychological nature. The next two parts of the soul are not implanted at birth, but can be developed over time; their development depends on the actions and beliefs of the individual. They are said to only fully exist in people awakened spiritually. A common way of explaining the three parts of the soul is as follows:

• Nefesh (נפש): the lower part, or "animal part", of the soul. It is linked to instincts and bodily cravings.
• Ruach (רוח): the middle soul, the "spirit". It contains the moral virtues and the ability to distinguish between good and evil.
• Neshamah (נשמה): the higher soul, or "super-soul". This separates man from all other life-forms. It is related to the intellect, and allows man to enjoy and benefit from the afterlife. This part of the soul is provided at birth and allows one to have some awareness of the existence and presence of God.