Each of us bears the imprint of a friend met along the way; In each the trace of each.

For me chemistry represented an indefinite cloud of future potentialities which enveloped my life to come in black volutes torn by fiery flashes, like those which had hidden Mount Sinai. Like Moses, from that cloud I expected my law, the principle of order in me, around me, and in the world... I would watch the buds swell in spring, the mica glint in the granite, my own hands, and I would say to myself: "I will understand this, too, I will understand everything.

The future of humanity is uncertain, even in the most prosperous countries, and the quality of life deteriorates; and yet I believe that what is being discovered about the infinitely large and infinitely small is sufficient to absolve this end of the century and millennium. What a very few are acquiring in knowledge of the physical world will perhaps cause this period not to be judged as a pure return of barbarism.

To accuse another of having weak kidneys, lungs, or heart, is not a crime; on the contrary, saying he has a weak brain is a crime. To be considered stupid and to be told so is more painful than being called gluttonous, mendacious, violent, lascivious, lazy, cowardly: every weakness, every vice, has found its defenders, its rhetoric, its ennoblement and exaltation, but stupidity hasn't.

Our ignorance allowed us to live, as you are in the mountains, and your rope is frayed and about to break, but you don't know it and feel safe.

Auschwitz is outside of us, but it is all around us, in the air. The plague has died away, but the infection still lingers and it would be foolish to deny it. Rejection of human solidarity, obtuse and cynical indifference to the suffering of others, abdication of the intellect and of moral sense to the principle of authority, and above all, at the root of everything, a sweeping tide of cowardice, a colossal cowardice which masks itself as warring virtue, love of country and faith in an idea.

It is this refrain that we hear repeated by everyone: you are not at home, this is not a sanatorium, the only exit is by way of the Chimney. (What did it mean? Soon we were all to learn what it meant.)