Plato’s essences of the mind are still around today, though their names have changed (and we’ve dispensed with the horses). Nowadays we call them perception, emotion, and cognition. Freud called them the id, the ego, and the superego. The psychologist and Nobel laureate Daniel Kahneman metaphorically calls them System 1 and System 2. (Kahneman is very careful to say it’s a metaphor, but many people seem to be ignoring him and essentializing Systems 1 and 2 as blobs in the brain.)
