Being human signifies, for each one of us, belonging to a class, a society, a country, a continent and a civilization; and for us European earth-dwellers, the adventure played out in the heart of the New World signifies in the first place that it was not our world and that we bear responsibility for the crime of its destruction.

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

In the old days, people used to risk their lives in India or in the Americas in order to bring back products which now seem to us to have been of comically little worth, such as brazilwood and pepper, which added a new range of sense experience to a civilization which had never suspected its own insipidity... From these same lands our modern Marco Polos now bring back the moral spices of which our society feels an increasing need as it is conscious of sinking further into boredom, but that this time they take the form of photographs, books, and travelers tales.

Nor must we forget that in science there are no final truths.

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.

Enthusiastic partisans of the idea of progress are in danger of failing to recognize the immense riches accumulated by the human race. By underrating the achievements of the past, they devalue all those which still remain to be accomplished.