"My religion consists of a humble admiration of the illimitable superior spirit who reveals himself in the slight details we are able to perceive with our frail and feeble mind."
"Love is a better teacher than duty."
"Great spirits have always encountered opposition from mediocre minds. The mediocre mind is incapable of understanding the man who refuses to bow blindly to conventional prejudices and chooses instead to express his opinions courageously and honestly."
"If you can't explain it to a six year old, you don't understand it yourself."
"An empty stomach is not a good political adviser."
"If people are good only because they fear punishment, and hope for reward, then we are a sorry lot indeed."