Aion: Researches into the Phenomenology of the Self (1951) is a seminal work by C.G. Jung that investigates the archetype of the and its historical manifestation through the symbol of Christ. Often cited as one of his most complex later works, it explores how the collective psyche has evolved through the Christian era, or "aeon". Core Psychological Concepts
: The center of consciousness, distinct from the total personality.
: The hidden or repressed "dark side" of the personality.
The book's opening chapters provide a concise summary of Jung's key psychological structures:
