“Now self-love is a restless, anxious, overeager love, and so the work done on its behalf is troubled, vexatious, and unsatisfactory; whereas the Love of God is calm, peaceful, and tranquil, and so the work done for its sake, even in worldly things, is gentle, trustful, and quiet.”
Source: St. Francis de Sales, Introduction to the Devout Life, Random House, Inc., 2002.