“When in doubt, ATTACK!”

“In a fight, your doubt is a target of enemy's attack.”

“But man is a strayed animal, and when he falls victim to doubt, if he should happen to take no further pleasure in attacking others, he turns on himself in order to inflict merciless tortures.”

“I will not attack your doctrines nor your creeds if they accord liberty to me. If they hold thought to be dangerous - if they aver that doubt is a crime, then I attack them one and all, because they enslave the minds of men.I attack the monsters, the phantoms of imagination that have ruled the world. I attack slavery. I ask for room -- room for the human mind.”

“How shall freedom be defended? By arms when it is attacked by arms, by truth when it is attacked by lies, by faith when it is attacked by authoritarian dogma. Always, in the final act, by determination and faith.”

“Every man is wise when attacked by a mad dog; fewer when pursued by a mad woman; only the wisest survive when attacked by a mad notion.”