Certainty generally is illusion, and repose is not the destiny of man.

The history of intellectual growth and discovery clearly demonstrates the need for unfettered freedom, the right to think the unthinkable, discuss the unmentionable, and challenge the unchallengeable. To curtail free expression strikes twice at intellectual freedom, for whoever deprives another of the right to state unpopular views necessarily also deprives others of the right to listen to those views.

There is nothing earthly that lasts so well, as money. A man's learning dies with him, as does his virtues fade out of remembrance, but the dividends on the stocks he bequeaths to his children live and keep his memory green.

The best of a book is not the thought which it contains, but the thought which it suggests; just as the charm of music dwells not in the tones but in the echoes of our hearts.

Young men know the rules, but old men know the exceptions.

Fame usually comes to those who are thinking about something else.

Every man is an omnibus in which his ancestors ride.