A fanatic is one who can't change his mind and won't change the subject. Winston Churchill
A fanatic is a man who does what he thinks the Lord would do if only He knew the facts of the case. Finley Peter Dunne
Defined in psychological terms, a fanatic is a man who consciously over-compensates a secret doubt. Aldous Huxley
A fanatic is a nut who has something to believe in. Dean Koontz
If you see one cold and vehement at the same time, set him down for a fanatic. Johann Kaspar Lavater
Out of Ireland have we come, great hatred, little room, maimed us at the start. I carry from my mother's womb a fanatic heart. William Butler Yeats