A fanatic is one who can't change his mind and won't change the subject.

He that rides his hobby gently must always give way to him that rides his hobby hard.

An infallible method of making fanatics is to persuade before you instruct.

A fanatic is one who can't change his mind and won't change the subject.

There is no strong performance without a little fanaticism in the performer.

Political extremism involves two prime ingredients: an excessively simple diagnosis of the world's ills and a conviction that there are identifiable villains back of it all.

I would remind you that extremism in the defense of liberty is no vice. And let me remind you also that moderation in the pursuit of justice is no virtue.

The less justified a man is in claiming excellence for his own self, the more ready is he to claim all excellence for his nation, his religion, his race or his holy cause.

If there is anything more dangerous to the life of the mind than having no independent commitment to ideas, it is having an excess of commitment to some special and constricting idea.

Fanatics have their dreams, where-with they weave A paradise for a sect.