Psyche, Soul, Body

'Psyche' means 'Soul', so Freud's concept of the former is part of the long and complicated history of the latter.  Plato and Aristotle agree that the Soul has three parts, which can be conceived as vegetative, locomotive, and rational.  However, they diverge regarding the Soul-Body relation--the former conceives them as separable, the latter as Form-Matter, and, hence, as is inseparable.  Now, Christianity adopts the Platonist version, but without attending to one of its apparent coherences--incorporeality, yet, containing vegetative and locomotive dimensions.  In contrast, Descartes resolves that problem by purging the Soul of those parts, leaving it as equivalent to Mind, a concept that dominates for centuries, including when Mind is conceived as Consciousness.  So, Freud's Id restores those dimensions to the Soul, though without distinguishing them.  However, he offers no clear concept of the Soul-Body relation, leaving his theory open to both Epiphenomenal and Physicalist interpretations.