Any prolonged exercise of self-will injures our intrigrity, whether its purpose is the direct pursuit of pleasure or, more indirectly, the avoidance of pain. To the extent that our will is concerned principally with pleasing ourselves, we can anticipate trouble. On the other hand, learning to live with situations that cannot be changed is a guage of maturity and a valuable means of preseverving our peace of mind.
Michael Casey, OSCO
A Guide to Living in the Truth, p. 98.