“In the beginner's mind there are many possibilities; in the expert's mind there are few.”

The line separating good and evil passes not through states, nor between classes, nor between political parties either — but right through every human heart.

Utopia is on the horizon. I move two steps closer; it moves two steps further away. As much as I may walk, I'll never reach it. So what's the point of utopia? The point is this: to keep walking.

The teacher who is indeed wise does not bid you to enter the house of his wisdom but rather leads you to the threshold of your mind.

Mistakes are the portals of discovery.

Beauty is eternity gazing at itself in a mirror.

The tendency of man's nature to good is like the tendency of water to flow downwards.

If your experiment needs statistics, you ought to have done a better experiment.

Think lightly of yourself and deeply of the world.