The basic meaning of the horoscope is that, by mapping out the positions of the planets and their relations to one another (aspects), together with the distribution of the signs of the zodiac at the cardinal points, it gives a picture first of the psychic and then of the physical constitution of the individual.
Jung defines the horoscope’s foundational function as a dual portrait of psychic and physical individuality, grounding it within Jungian depth-psychology as a symbol of the Self’s original constitution.
, Aion: Researches into the Phenomenology of the Self, 1951thesis