Rebirth is an affirmation that must be counted among the primordial affirmations of mankind. The concept of rebirth necessarily implies the continuity of personality. Here the human personality is regarded as continuous and accessible to memory, so that, when one is incarnated or born, one is able, potentially, to remember that one has lived through previous existences, and that these existences were one's own, ie, they had the same ego form as the present life. As a rule, reincarnation means rebirth in a human body.
Carl JungWhen we must deal with problems, we instinctively resist trying the way that leads through obscurity and darkness. We wish to hear only of unequivocal results, and completely forget that these results can only be brought about when we have ventured into and emerged again from the darkness. But to penetrate the darkness we must summon all the powers of enlightenment that consciousness can offer.
Carl JungThe Shadow is a moral problem that challenges the whole ego-personality, for no one can become conscious of the shadow without considerable moral effort. To become conscious of it involves recognizing the dark aspects of the personality as present and real. This act is the essential condition for any kind of self-knowledge, and it therefore, as a rule, meets with considerable resistance. Indeed, self-knowledge as a psychotherapuetic measure frequently requires much painstaking work extending over a long period of time.
Carl Jung