“This is why I told you earlier that if those who eat at the table of penance are not truly humble, and if their penance becomes their chief concern rather than an instrument of virtue, they will often, by this sort of grumbling, sin against their very perfection. So they should not be foolish, but should see that perfection consists not only in beating down and killing the body but in slaying the perverse selfish will.” -St. Catherine of Siena