Merlin represents an attempt by the medieval unconscious to create a parallel figure to Parsifal. Parsifal is a Christian hero, and Merlin, son of the devil and a pure virgin, is his dark brother.
Jung identifies Merlin as the unredeemed dark twin of the Christian hero, whose exile and untranslatable cry represent the unconscious seeking integration — a secret carried on by alchemy and, ultimately, by analytical psychology itself.
, Memories, Dreams, Reflections, 1963thesis