Education is learning what you didn't even know you didn't know.

A sign of celebrity is that his name is often worth more than his services.

The hero is known for achievements; the celebrity for well-knowns. The hero reveals the possibilities of human nature. The celebrity reveals the possibilities of the press and media. Celebrities are people who make news, but heroes are people who make history. Time makes heroes but dissolves celebrities.

The great obstacle to discovering the shape of the earth, the continents, and the oceans was not ignorance, but the illusion of knowledge.

We must abandon the prevalent belief in the superior wisdom of the ignorant.

American civilization, from its beginnings, had combined a dogmatic confidence in the future with a naive puzzlement over what the future might bring.

The computer can help us find what we know is there. But the book remains our symbol and our resource for the unimagined question and the unwelcome answer.