The term "psyche" refers to the concept of the soul or mind in various philosophical and psychological contexts. It encompasses the mental faculties, emotions, and consciousness that define human experience. In ancient Greek philosophy, Plato and Aristotle explored the nature of the psyche, linking it to reason, perception, and the essence of being. In modern psychology, the psyche is often associated with the inner workings of the mind, including thoughts, feelings, and behaviors. Sigmund Freud introduced the idea of the psyche as comprising three parts: the id, ego, and superego, which interact to shape personality and influence actions.