The twin or double is the self met as other — the doppelgänger of folklore, the identical figure who is you and not-you. Meeting your double is among the most uncanny dream experiences: the life you might have lived, the self you also are.
Positive Resonance
Self-knowledge through the mirror-other, the twin as completion
Shadow Aspect
The double as omen, the other self living your unlived life, identity divided
Nuances
Meeting your double: confronting the alternate self
Twin doing what you would not: the shadow embodied identically
Losing your twin: separation from a completing other