Friedrich Wilhelm Nietzsche,
The Will to Power: An Attempted Transvaluation of All Values…
“ One's modesty; the fact that one has not lent an ear to one's most individual needs; the fact that one has mistaken one's self; the fact that one has esteemed one's self low; the fact that one has lost all delicacy of hearing in regard to one's instincts.—This want of reverence in regard to one's self is avenged by all sorts of losses: in health, friendship, well-being, pride, cheerfulness, freedom, determination, courage. A man never forgives himself, later on, for this want of genuine egoism: he regards it as an objection and as a cause of doubt concerning his real ego. ”
