"The trade of chemist , teaches you to overcome, indeed to ignore, certain revulsions that are neither necessary or congenital: matter is matter, neither noble nor vile, infinitely transformable, and its proximate origin is of no importance whatsoever. Nitrogen is nitrogen, it passes miraculously from the air into plants, from these into animals, and from animals into us; when its function in our body is exhausted, we eliminate it, but it still remains nitrogen, aseptic, innocent."

“We who survived the Camps are not true witnesses. We are those who, through prevarication, skill or luck, never touched bottom. Those who have, and who have seen the face of the Gorgon, did not return, or returned wordless.”

“A country is considered the more civilised the more the wisdom and efficiency of its laws hinder a weak man from becoming too weak and a powerful one too powerful.”

“Beware of analogies: for millenia they corrupted medicine, and it may be their fault that today's pedagogical systems are so numerous, and after three thousand years of argument we still don't know which is best.”

“I read somewhere — and the person who wrote this was not a mountaineer but a sailor — that the sea’s only gifts are harsh blows and, occasionally, the chance to feel strong. Now, I don’t know much about the sea, but I do know that that’s the way it is here. And I also know how important it is in life not necessarily to be strong but to feel strong, to measure yourself at least once, to find yourself at least once in the most ancient of human conditions, facing blind, deaf stone alone, with nothing to help you but your own hands and your own head.”

“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.”

“If a shoe hurts, one has to go in the evening to the ceremony of the changing of the shoes: this tests the skill of the individual who, in the middle of the incredible crowd, has to be able to choose at an eye's glance one shoe, which fits. Because once the choice is made, there can be no second change. And do not imagine that shoes are not important in the life of the Lager. Death begins with the shoes; for most of us, they show themselves to be instruments of torture, which after a few hours of marching cause painful sores which become fatally infected. Whoever has them is forced to walk as if he were dragging a convict's chain ; he arrives last everywhere, and everywhere he receives blows. He cannot escape if they run after him; his feet swell and the more they swell, the more the friction with the wood and the cloth of the shoes becomes insupportable. Then only the hospital is left: but to enter the hospital with a diagnosis of "dicke Füsse" is extremely dangerous, because it is well known to all, and especially to the SS, that here there is no cure for that complaint.”