"The ultimate arbiter of truth is experiment, not the comfort one derives from one's a priori beliefs, nor the beauty or elegance one ascribes to one's theoretical models."

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Everyone must feel that he is the supreme arbiter of his own [destiny], that no power on earth shall rise over him, that he is and always shall be sovereign of himself and all relating to his individuality. Then only shall all men realize security of person and property.

— Josiah Warren