People who develop the habit of thinking of themselves as world citizens are fulfilling the first requirement of sanity in our time

The way a book is read which is to say, the qualities a reader brings to a book can have as much to do with its worth as anything the author puts into it

Pessimism is a waste of time

Optimism doesn't wait on facts. It deals with prospects. Pessimism is a waste of time.

Just as there is no loss of basic energy in the universe, so no thought or action is without its effects, present or ultimate, seen or unseen, felt or unfelt

Laughter is a form of internal jogging. It moves your internal organs around. It enhances respiration. It is an igniter of great expectations

The more serious the illness, the more important it is for you to fight back, mobilizing all your resources-spiritual, emotional, intellectual, physical

Hope is independent of the apparatus of logic

History is a vast early warning system

A library, to modify the famous metaphor of Socrates, should be the delivery room for the birth of ideas - a place where history comes to life