Reincarnation is the counterpart in the Orient of purgatory in the West. That is to say, it is a chance to live again, to live out the experiences that should have illuminated you.
Campbell makes the structural argument that purgatory and reincarnation are functionally equivalent post-mortem processes for purging ego-bound attachment and completing unfulfilled illumination.
, Transformations of Myth Through Time, 1990thesis