“Reason, observation, and experience the holy trinity of science.”
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We need men with moral courage to speak and write their real thoughts, and to stand by their convictions, even to the very death.
If I owe Smith ten dollars and God forgives me, that doesn't pay Smith.
Religion can never reform mankind because religion is slavery.
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.