Ignorance per se is not nearly as dangerous as ignorance of ignorance.

A winner knows how much he still has to learn, even when he is considered an expert by others; a loser wants to be considered an expert by others before he has learned enough to know how little he knows.

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

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.