From time to time his higher self will show him his own moral face as in a glass. But it will only show him that side of it which is the worst as well as the least-known one. He will have to look at what is thus exposed to him in all its stark fullness and hidden reality, only because he has to re-educate himself morally to a degree far beyond the ordinary. The experience may be painful, but it must be accepted. He has invoked the Overself, now its light has suddenly been thrown upon him. He is now able to see his ego, his lower nature, as it has not hitherto shown itself to him. All its uglinesses are lit up and revealed for what they really are. By thus showing up its true nature and evil consequences, this experience is the first step to making the ego's conquest possible.
-- Notebooks Category 6: Emotions and Ethics > Chapter 1: Uplift Character > # 73