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In kabbalah, the animal soul (נפש הבהמית; nefesh habehamit) is one of the two souls of a Jew. It is the soul that gives life to the physical body, as stated in Tanya, and is the source of animalistic desires as well as innate Jewish characteristics such as kindness and compassion. Although its initial desire is to seek out worldly, physical pleasures, it can be trained to desire spiritual pleasures instead through the guidance of the divine soul.
Transforming the animal soul
While the animal soul is still attached to worldly, physical pleasures, it is synonymous with the yetzer hara, the evil inclination. However, the nefesh habehamit is not inherently evil; it merely seeks pleasure. Through persistent, joyous exposure to Torah study and observance of mitzvot, the nefesh habehamit can be trained to desire spiritual and divine pleasures. In its refined state, it is often termed the nefesh hachiyunit, the life-giving soul, because its primary function then is to give life and energy to the body in order to study Torah and perform the mitzvot.
The nefesh habehamit is typically mentioned together with the nefesh ha'elokit, the divine soul, because the nefesh habehamit and the nefesh ha'elokit are at first in opposition to each other. Chassidut teaches that every person must seek to dominate and conquer the nefesh habehamit to make it serve the nefesh ha'elokit.
Parable of the Harlot and the Prince
The nefesh habehamit actually desires to be defeated, as explained by a Zoharic parable of a king (God) who desired to test the mettle of his son, the prince (the soul, whose true identity is the nefesh ha'elokit). The king hires a beautiful harlot (the yetzer hara) to seduce his son, explaining to her that his goal is to test the son. She is to utilize all of her wiles and techniques to ensnare the prince, as anything less would not be a true test. However, inwardly, the harlot wants that the prince should succeed and not succumb to her.
Thus, the sole purpose for evil's existence is to be defeated by humankind, and this is for people's own benefit.
Levels of conquest
The Tanya explains that it is within the power of all people to at least control the so-called "garments" of the soul. These garments are thought, speech and action, and are derived from the verse (Deuteronomy 30:14), "For it is exceedingly close to you, in your mouth [speech] and heart [thought], to do it [action]." Once these three garments are wholly devoted to Torah and mitzvot, a person attains the rank of a beinoni, and this is within reach of every person.
A tzadik is a person who has utterly transformed the actual emotions of the nefesh habehamit. That is, instead of changing just the external "garments" of the soul, they have transformed the soul's emotions themselves and actually feel no attachment to worldly desires. Their sole desire is for divine pleasures.
The above, however, describes an "incomplete tzadik" in whom a small remnant of evil remains. A "complete tzadik" is a person in whom the essential nature of the nefesh habehamit has been transformed, to the extent that the person "transforms the evil and elevates it to holiness", turning "darkness to light". This tzadik not only feels no attachment to evil, but utterly hates it.
Relation to human anatomy
The Tanya teaches that the nefesh habehamit is primarily manifest in the left ventricle of heart, and that from there, it spreads throughout the body via the blood. It fights against the nefesh ha'elokit by flooding blood to the brain, where the nefesh ha'elokit resides. The nefesh habehamit itself may be defeated by causing the brain to control the heart, that is, by causing logic to control and guide the emotions. In fact, this is considered the natural state of a person, since in a human the brain is physically positioned above the heart (in contrast to animals, where the brain and the heart are on the same level).
- "Building Block No. 6: Nefesh HaBahamis (Animal Soul), Nefesh HoElokis (G‑dly Soul)." http://www.chabad.org/library/article_cdo/aid/80970/jewish/Nefesh-HaBahamis-Animal-Soul-Nefesh-HoElokis-G-dly-Soul.htm
- Freeman, Tzvi. "Me and My Body: a Dialogue." Heaven Exposed. http://www.chabad.org/library/article_cdo/aid/740798/jewish/Me-and-My-Body-a-Dialogue.htm
- Schneersohn, Shalom Dovber. "Veyeilech ish mibeit leivi." Hemshech Samech-Vov: Yom Tov Shel Rosh Hashanah. pp. 137–46. (Hebrew)
- Weinberg, Yosef. Lessons in Tanya. (This contains the full text of the Tanya translated into English, with English commentary translated from Yiddish. It also includes the original Hebrew text of the Tanya.) Lessons in Tanya: The Tanya of R. Shneur Zalman of Liadi (5 Volume Set). ISBN 9780826605405.
- Behemoth (Hebrew בהמות, lit. "animal", "beast")
- Likkutei Amarim ch. 9, Tanya
- Zohar part II 163a. See The paradoxical mission of evil
- Likkutei Amarim ch. 9, Lessons in Tanya by R. Yosef Weinberg.
- Likkutei Amarim ch. 17, Lessons in Tanya
- Likkutei Amarim ch. 14, Tanya
- Likkutei Amarim ch. 10, Tanya
- Likkutei Amarim ch. 10, Lessons in Tanya
- Kitzur Shulchan Aruch 10:10 regarding the tefilin that are placed near the brain and the heart (translated by Rabbi Avrohom Davis for Metsudah Publications): "We must subject to Him the soul (neshama) that resides in the brain, and also the heart, which is the source of desire and thoughts. By so doing, we will remember the Creator and restrain our indulgences and fulfill [that which is written:] 'And you will not turn aside after your hearts and after your eyes' (Numbers 15:39)." See similar language in Shulchan Aruch, Hilchot Tefilin; and also Shulchan Aruch HaRav, ibid.