"Doubt is useful for a while. We must all pass through the garden of Gethsemane. If Christ played with doubt, so must we."

The pursuit of science is more than the pursuit of understanding. It is the pursuit of a kind of wisdom that comes from knowing how much we do not know.

The stupid believe that to be truthful is easy; only the artist, the great artist, knows how difficult it is.

I have great faith in fools; self-confidence my friends call it.

In times of crisis, true leaders emerge by staying calm, focused and decisive.