The value of a man resides in what he gives
Do not grow old, no matter how long you live.
Science is a wonderful thing if one does not have to earn one's living at it.
Games are the most elevated form of investigation.
Education is what remains after one has forgotten what one has learned in school.
Although words exist for the most part for the transmission of ideas, there are some which produce such violent disturbance in our feelings that the role they play in the transmission of ideas is lost in the background.