• In studying the history of the human mind one is impressed again and again by the fact that its growth keeps pace with a widening range of consciousness, and that each step forward is an extremely painful and laborious achievement. One could almost say that nothing is more hateful to man than to give up the smallest particle of unconsciousness. He has a profound fear of the unknown. Ask anybody who has ever tried to introduce new ideas!

    "Collected Works of C.G. Jung: The development of personality".