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

"He who influences the thought of his times influences all the times that follow."

"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."

"All formal dogmatic religions are fallacious and must never be accepted by self-respecting persons as final."