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:
The Raaya Meheimna, a section of related teachings spread throughout the Zohar, discusses fourth and fifth parts of the human soul, the chayyah andyehidah (first mentioned in the Midrash Rabbah). Gershom Scholem writes that these "were considered to represent the sublimest levels of intuitive cognition, and to be within the grasp of only a few chosen individuals". The Chayyah and the Yechidah do not enter into the body like the other three - thus they received less attention in other sections of the Zohar.
Both rabbinic and kabbalistic works posit that there are a few additional, non-permanent states of the soul that people can develop on certain occasions. These extra souls, or extra states of the soul, play no part in any afterlife scheme, but are mentioned for completeness: