(this is a story interwoven with freezing dawns.) - Primo Levi

...better not to do than to do, better to meditate than to act, better his astrophysics, the threshold of the Unknowable, than my chemistry, a mess compounded of stenches, explosions and small futile mysteries. I thought of another moral, more down to earth and concrete, and I believe that every militant chemist can confirm it: that one must distrust the almost-the-same (sodium is almost the same as potassium, but with sodium nothing would have happened_, the practically identical, the approximate, the or-even, all surrogates, and all patchwork. the difference can be small, but they can lead to radically different consequences, like a railroad's switch points; the chemist's trade consists in good part in being aware of these differences, knowing them close up, and foreseeing their effects. And not only the chemist's trade.

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 easily loses himself. He will be a man whose life or death can be lightly decided with no sense of human affinity, in the most fortunate of cases, on the basis of a pure judgment of utility. It is in this way that one can understand the double sense of the term “extermination camp,” and it is now clear what we seek to express with the phrase: “to lie on the bottom.

I do not know what I will think tomorrow and later; today I feel no distinct emotion.