Kabbalah

Ruach — The Spirit of Moral Feeling

The second level of soul, the seat of emotion, character traits, and moral feeling that sits between raw bodily vitality and higher intellectual awareness.

Ruach, literally 'spirit' or 'wind,' governs what Kabbalists call the middot — the emotional character traits like patience, anger, generosity, and pride that shape how a person actually behaves toward others, distinct from both bare physical instinct (Nefesh) and abstract intellectual understanding (Neshamah). Because Ruach is where character is formed, it is the soul-level most directly addressed by ethical teaching and the disciplines of self-refinement that Kabbalists inherited from earlier rabbinic ethical literature (mussar), rather than by ritual or study alone. Its position between Nefesh and Neshamah reflects a broader Kabbalistic pattern: moral development is treated as the necessary bridge between physical existence and intellectual-spiritual attainment, not something that can be skipped over. A person is understood to be capable of refining their Ruach throughout life, gradually reshaping instinctive emotional reactions into deliberate, virtuous character — which is precisely the work later Hasidic and mussar teachers built entire practical disciplines around.

Zohar