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

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

"The only way to make sense out of change is to plunge into it, move with it, and join the dance."

"The only way to wisdom is through fearless questioning."

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