Conflict

The apparently unendurable conflict is proof of the rightness of your life.  A life without inner contradiction is either only half a life or else a life in the Beyond, which is detined only for angels.  But God loves human beings more than the angels.  (C.G. Jung Letter, vol. 1, p. 375)

The self is made manifest in the opposites and in the conflict between them; it is a coincidentia oppositorum [coincidence of opposites].  Hence the way to the self begins with conflict. 

The stirring up of conflict is a Luciferian virtue in the true sense of the word.  Conflict engenders fire, the fire of affects and emotions, and like every other fire it has two aspects, that of combustion and that of creating light

Jung's major contribution to the psychology of conflict was his belief that it had a purpose in terms of the self-regulation of the psyche.  If the tension between the opposites can be held in consciousness, then something will happen internally to resolve the conflict.  The solution, essentially irrational and unforeseeable, generally appears as a new attitude toward oneself and the outer situation, together with a sense of peace; energy previously locked up in indecision is released and the progression of libido becomes possible. 

Holding the tension between opposites requires patience and a strong ego, otherwise a decision will be made out of desperation.  Then the opposite will be constellated even more strongly and the conflict will continue with renewed force.

Jung's basic hypothesis in working with neurotic conflict was that separate personalities in oneself - complexes - were involved.  As long as these are not made conscious they are acted out externally, through projection.  Conflicts with other people are thus essentially externalizations of an unconscious conflict within oneself