Imagination is the most powerful force in the universe.

The true definition of madness is repeating the same action, over and over, hoping for a different result.

Do not grow old, no matter how long you live.

I should much rather see reasonable agreement with the Arabs on the basis of living together in peace than the creation of a Jewish state. My awareness of the essential nature of Judaism resists the idea of a Jewish state with borders, an army, and a measure of temporal power, no matter how modest. I am afraid of the inner damage Judaism will sustain—especially from the development of a narrow nationalism within our own ranks, against which we have already had to fight strongly, even without a Jewish state.

An empty stomach is not a good political adviser.

Thinking like we (always) have is what got us where we are. It is not going to get us where we are going.

Make everything as simple as possible, but not simpler.