If it is true that there is no greater sorrow than to remember a happy time in a state of misery, it is just as true that calling up a moment of anguish in a tranquil mood, seated quietly at one's desk, is a source of profound satisfaction.

Imagine now a man who is deprived of everyone he loves, and at the same time of his house, his habits, his clothes, in short, of everything he possesses: he will be a hollow man, reduced to suffering and needs, forgetful of dignity and restraint, for he who loses all often loses himself.

It is neither easy nor agreeable to dredge this abyss of viciousness, and yet I think it must be done, because what could be perpetrated yesterday could be attempted again tomorrow, could overwhelm us and our children. One is tempted to turn away with a grimace and close one's mind: this is a temptation one must resist. In fact, the existence of the death squads had a meaning, a message: 'We, the master race, are your destroyers, but you are no better than we are; if we so wish, and we do so wish, we can destroy not only your bodies, but also your souls, just as we have destroyed ours.

We collected in a group in front of their door, and we experienced within ourselves a grief that was new for us, the ancient grief of the people that has no land, the grief without hope of the exodus which is renewed in every century.

I have many times been praised for my lack of animosity towards the Germans. It's not a philosophical virtue. It's a habit of having my second reactions before the first.

A man who would mutilate himself is well damned, isn't he?

Did chemistry theorems exist? No: therefore you had to go further, not be satisfied with the quia, go back to the origins, to mathematics and physics. The origins of chemistry were ignoble, or at least equivocal: the dens of the alchemists, their abominable hodgepodge of ideas and language, their confessed interest in gold, their Levantine swindles typical of charlatans and magicians; instead, at the origin of physics lay the strenuous clarity of the West-Archimedes and Euclid.