When we remember we are all mad, the mysteries disappear and... - Mark Twain

"A successful book is not made of what is in it, but what is left out of it."

"The easy confidence with which I know another man's religion is folly teaches me to suspect that my own is also."

"When we remember we are all mad, the mysteries disappear and life stands explained."

"Familiarity breeds contempt and children."

"It usually takes me two or three days to prepare an impromptu speech."