“A scientist’s life, the author says, is indeed conflictual, formed by battles, defeats, and victories: but the adversary is always and only the unknown.”

I’m a libertine, but it’s not my specialty.

One is tempted to turn away with a grimace and close one’s mind: this is a temptation one must resist.

I too entered the Lager as a nonbeliever, and as a nonbeliever I was liberated and have lived to this day.

I beg the reader not to go in search of messages. It is a term that I detest because it distresses me greatly, for it forces on me clothes that are not mine, which in fact belong to a human type that I distrust; the prophet, the soothsayer, the seer.

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

For people of science, he is a hero. Denying man a privileged place in creation, .. he reaffirms with his own intellectual courage the dignity of man.

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.

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

Never again could it be cleansed; it would prove that man, the human species – we, in short – had the potential to construct an enormity of pain, and that pain is the only force created from nothing, without cost and without effort. It is enough not to see, not to listen, not to act.

Even in this place one can survive, and therefore one must want to survive, to tell the story, to bear witness; and that to survive we must force ourselves to save at least the skeleton, the scaffolding, the form of civilization.

This cell belongs to a brain, and it is my brain, the brain of me who is writing; and the cell in question, and within it the atom in question, is in charge of my writing, in a gigantic minuscule game which nobody has yet described.

Conquering matter is to understand it, and understanding matter is necessary to understanding the universe and ourselves: and that therefore Mendeleev’s Periodic Table, which just during those weeks we were learning to unravel, was poetry.

If you and your child were going to be killed tomorrow, would you not give him to eat today?

There are few men who know how to go to their deaths with dignity, and often they are not those whom one would expect.

It is the duty of righteous men to make war on all undeserved privilege, but one must not forget that this is a war without end.

Nothing can be said: nothing sure, nothing probable, nothing honest. Better to err through omission than through commission: better to refrain from steering the fate of others, since it is already so difficult to navigate one’s own.