There is one fact that can be established. The only phenomenon which, always and in all parts of the world, seems to be linked with the appearance of writing

Language is a form of human reason, which has its internal logic of which man knows nothing.

Scientific knowledge advances haltingly and is stimulated by contention and doubt.

[Photography] remains servile to a thoughtless vision of the world... As the term snapshot suggests, photography seizes the moment and exhibits it.

Our students wanted to know everything: but only the newest theory seemed to them worth bothering with. Knowing nothing of the intellectual achievements of the past, they kept fresh and intact their enthusiasm for 'the latest thing'. Fashion dominated their interest: they valued ideas not for themselves but for the prestige that they could wring from them.

The scientist is not a person who gives the right answers, he is one who asks the right questions.

Animals are good to think with.