Men make counterfeit money; in many more cases, money makes counterfeit men.

The real danger is not that computers will begin to think like men, but that men will begin to think like computers.

We have not passed that subtle line between childhood and adulthood until... we have stopped saying "It got lost," and say "I lost it."

The three hardest tasks in the world are neither physical feats nor intellectual achievements, but moral acts: to return love for hate, to include the excluded, and to say, 'I was wrong'.

The time to relax is when you don't have time for it.

Good teaching must be slow enough so that it is not confusing, and fast enough so that it is not boring.