"No, my child, we must never, in our wish to shun slander, foster or flatter vice in others; but we must call evil evil, and sin sin, and so doing we shall serve God’s Glory." Source: St. Francis de Sales, Introduction to the Devout Life, Random House, Inc., 2002.
"You must seek earnestly the grace of devotion, ask for it fervently, await it patiently and hopefully, receive it gratefully, guard it humbly, cooperate with it carefully and leave to God, when it comes, the length and manner of the heavenly visitation. When you feel little or no inward devotion, you should especially humiliate yourself, [...]
"I have rebuked people who were engaged in slander, and, in self-defense, these evildoers claimed to be acting out of love and concern for the victim of their slander. My answer to that was to say: 'Then stop that kind of love, or else you will be making a liar out of him who declared, [...]