“He must increase, but I must decrease.” (St. John the Forerunner speaking about Jesus, John 3:30)
“You say that you have no success. Indeed, there will be no success so long as you are full of self-indulgence and self-pity. These two things show at once that what is uppermost in your heart is “I” and not the Lord. It is the sin of self-love, living within us, that gives birth to all our sinfulness, making the whole man a sinner from head to food, so long as we allow it to dwell in the soul. And when the whole man is a sinner, how can grace come to him? It will not come, just as a bee will not come where there is smoke.
There are two elements in the decision to work for the Lord: First a man must deny himself, and secondly he must follow Christ (Mark 8:34). The first demands a complete stamping out of egoism or self-love, and consequently a refusal to allow any self-indulgence or self-pity–whether in great matters or small.” (St. Theophan the Recluse, Heavenly Wisdom from God-illuminated Teachers on Conquering Depression, pp. 55-56)