"Men will fight for superstition as quickly as for the living truth—even more so, since superstition is intangible and cannot be reached."

"Truth does not change because it is, or is not, believed by a majority of the people."

"Fables should be taught as fables, myths as myths, and miracles as poetic fancies."

"To rule by fettering the mind through fear of punishment in another world is just as base as to use force."

"The mind is its own place, and in itself can make a heaven of hell, a hell of heaven."