" Think of people you consider fanatical. They're overbearing, self-righteous, opinionated, insensitive, and harsh. Why? It's not because they are too Christian, it's because they are not Christian enough. They are fanatically zealous and courageous, but they are not fanatically humble, sensitive, loving, emphatic, forgiving, or understanding- as Christ was... What strikes us as overly fanatical is actually a failure to be fully committed to Christ and his gospel. "

― Timothy J. Keller , The Reason for God: Belief in an Age of Skepticism