Anything that gives us new knowledge gives us an opportunity to be more rational.

Learning is any change in a system that produces a more or less permanent change in its capacity for adapting to its environment.

Human beings, viewed as behaving systems, are quite simple. The apparent complexity of our behavior over time is largely a reflection of the complexity of the environment in which we find ourselves.

The classical theory of omniscient rationality is strikingly simple and beautiful.

One finds limits by pushing them.

In the computer field, the moment of truth is a running program; all else is prophecy.

A hero is someone who has given his or her life to something bigger than oneself.

Happiness is having a scratch for every itch.

Whether a revolution succeeds or fails people of great hearts will always be sacrificed to it.

Make all you can, save all you can, give all you can.

It takes courage...to endure the sharp pains of self discovery rather than choose to take the dull pain of unconsciousness that would last the rest of our lives.

If you make money your god, it will plague you like the devil.

Sometimes a cigar is just a cigar.

Why waste good shots in practice when you might need them in a match?

An injured lion still wants to roar.