Nobody who finds himself on the road to wholeness can escape that characteristic suspension which is the meaning of crucifixion. For he will infallibly run into things that thwart and “cross” him: first, the thing he has no wish to be (the shadow); second, the thing he is not (the “other,” the individual reality of the “You”); and third, his psychic non-ego (the collective unconscious).

Carl Jung - CW16 par. 470