Erich Neumann
Author: Erich Neumann
Publisher: Princeton University Press (1954)

One of the most important attainments of consciousness is its ability to dispose at will of the libido supplied to its system, and to use it more or less independently of the source from which it came.  Just as the animation occasioned in the reader by a 'stimulating' book can be applied to a poem, a walk, a bridge party, or a flirtation, without there necessarily being any connection between the book and the ego's reaction, so the ego can apply as it pleases a portion of the libido accruing to it from the conscious realization of an unconscious content.  This relative freedom of the ego, no matter how much it is abused, is one of its most precious accomplishments.