Jung’s most far-reaching discovery is the collective unconscious
Jung’s most basic and far-reaching discovery is the collective unconscious or archetypal psyche.
Through his researches, we now know that the individual psyche is not just a product of personal experience.
It also has a pre-personal or transpersonal dimension which is manifested in universal patterns and images such as are found in all the world’s religions and mythologies.
It was Jung’s further discovery that the archetypal psyche has a structuring or ordering principle which unifies the various archetypal contents.
This is the central archetype or archetype of wholeness which Jung has termed the Self. — Edward F. Edinger, Ego and Archetype, Page 3


