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

“Fanaticism is the opposite of love,’ I said, recalling one of Khaderbhai’s lectures. A wise man once told me—he’s a Muslim, by the way—that he has more in common with a rational, reasonable-minded Jew than he does with a fanatic from his own religion. He has more in common with a rational, reasonable-minded Christian or Buddhist or Hindu than he does with a fanatic from his own religion. In fact, he has more in common with a rational, reasonable-minded atheist than he does with a fanatic from his own religion. I agree with him, and I feel the same way. I also agree with Winston Churchill, who once defined a fanatic as someone who won’t change his mind and can’t change the subject.”

“Only fools and dead men don't change their minds. Fools won't and dead men can't.”

“If you can't change your mind, you can't change anything.”

“Those who cannot change their minds cannot change anything.”

“Progress is impossible without change; and those who cannot change their minds cannot change anything.”