A fanatic is one who can't change his mind and won't change the subject.
The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts.
A celibate clergy is an especially good idea, because it tends to suppress any hereditary propensity toward fanaticism.
From fanaticism to barbarism is only one step.
There is no place in a fanatic's head where reason can enter.
Tolerance and freedom of thought are the veritable antidotes to religious fanaticism.
Defined in psychological terms, a fanatic is a man who consciously over-compensates a secret doubt.
The most dangerous madmen are those created by religion, and people whose aim is to disrupt society always know how to make good use of them on occasion.
The fanatic is incorruptible: if he kills for an idea, he can just as well get himself killed for one; in either case, tyrant or martyr, he is a monster.
In the history of mankind, fanaticism has caused more harm than vice.
It may be possible to fight intolerance, stupidity, and fanaticism seperately, but when they come together there is no hope.
Fools and fanatics are always so certain of themselves.
The interval between the decay of the old and the formation and establishment of the new constitutes a period of transition which must always necessarily be one of uncertainty, confusion, error, and wild and fierce fanaticism.
Fanaticism, or, to call it by its milder name, enthusiasm, is only powerful and active so long as it is aggressive. Establish it firmly in power, and it becomes conservatism, whether it will or no.
All fanaticism is repressed doubt.
The fanatic has the courage of his conviction and the intolerance of his courage. He is opposed to the death penalty for murder, but he would willingly have anyone electrocuted who disagreed with him on the subject.
Fanaticism obliterates the feelings of humanity.
A fanatic, either, religious or political, is the subject of strong delusions.
In politics, what begins in fear usually ends in folly.
Fanaticism is overcompensation for doubt.
Fanatics are picturesque, mankind would rather see gestures than listen to reasons.
A fanatic is a man that does what he thinks the Lord would do if He knew the facts of the case.
Fanaticism, the false fire of an overheated mind.
Fanaticism is the child of false zeal and of superstition, the father of intolerance and of persecution.
E.P. Whipple calls fanaticism "religion caricatured," which is a full definition in a word.
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