“In the republic of mediocrity, genius is dangerous.”

“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.”

“There are in nature neither rewards nor punishments — there are consequences.”

“Labor is the only prayer that Nature answers: It is the only prayer that deserves an answer—good, honest, noble work. ”

“Happiness is not a reward - it is a consequence. Suffering is not a punishment - it is a result.”

“With soap, baptism is a good thing.”

“What light is to the eyes – what air is to the lungs – what love is to the heart, liberty is to the soul of man.”