Sweet words and great truths have value when uttered by righteous lips. They take root only in people of good will and clean conscience. Truth, when used without judgment, can commit a crime. And he who possesses sincerity without reason commits a twofold evil, first against himself, then against others. Because there’s no empathy in his sincerity. A Christian must not be a fanatic but have love in his heart for all. He who throws words around carelessly, even true words, does evil. Veneration is a good thing, and the predisposition for good is also good, but spiritual judgment and breadth are needed to guard against fanaticism, that false companion of reverence.” –Elder Paisios of the Holy Mountain
In The Spirit of Truth 