After the planet becomes theirs, many millions of years will have to pass before a beetle particularly loved by God, at the end of its calculations will find written on a sheet of paper in letters of fire that energy is equal to the mass multiplied by the square of the velocity of light. The new kings of the world will live tranquilly for a long time, confining themselves to devouring each other and being parasites among each other on a cottage industry scale.

Man is a centaur, a tangle of flesh and mind, divine inspiration and dust.

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, the problem to be solved, the mystery to be clarified. It is never a matter of civil war; even though of different opinions, or of different political leanings, scientists dispute each other, they compete, but they do not battle: they are bound together by a strong alliance, by the common faith "in the validity of Maxwell's or Boltzmann's equations," and by the common acceptance of Darwinism and the molecular structure of DNA.

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.

Human memory is a marvelous but fallacious instrument. The memories which lie within us are not carved in stone; not only do they tend to become erased as the years go by, but often they change, or even increase by incorporating extraneous features.

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.

My number is 174517; we have been baptized, we will carry the tattoo on our left arm until we die.