Can any of us ever conclude that we’re “good” enough to do something great for God? Mother Theresa and St. Faustina argued (directly!) with Jesus that they were too weak, foolish, and sinful to do what He was asking of them. Jesus responded that their weakness was their only qualification, and that when they succeeded the world would know that it was God’s work and not theirs.
h/t Cleveland's Cyber Cleric