"Our errors are not so much new and unheard of as they are old ones, dressed up in new clothes."

"The greatest enemy of any one of our truths may be the rest of our truths."

"The mind is at every stage a theater of simultaneous possibilities."

"No matter what you do, it will be insignificant, but it is very important that you do it."

"A great many people think they are thinking when they are merely rearranging their prejudices."