When there is question of working on one's self, a man experiences difficulty, he soon finds that he always does enough. But he will greatly devote himself for others, will sacrifice himself for their advancement, though he may be lax when there is question of self. In the same measure as he rushes forth to serve the neighbor, does he experience annoyance at entering into self to sacrifice self. He thinks that devotedness to others suffices, and he makes it his life-work, as if it supplied for everything else. This is a great snare. He will lose himself under pretext of saving others.
--St. Peter Julian Eymard