“You can’t destroy knowledge. You can stamp it under and burn it up and forbid it to be, but somewhere it will survive.”

“Witchcraft to the ignorant, .... Simple science to the learned.”

“(I)f you're not honest with yourself, life will never be honest with you.”

“There's never been an act done since the beginning, from a kid stealing candy to a dictator committing genocide, that the person doing it didn't think he was fully justified. That's a mental trick called rationalizing, and it's done the human race more harm than anything else you can name.”

“You can’t destroy knowledge. You can stamp it under and burn it up and forbid it to be, but somewhere it will survive.”