Primo Levi, Auschwitz survivor
Sooner or later in life everyone discovers that perfect happiness is unrealizable, but there are few who pause to consider the antithesis: that perfect unhappiness is equally unattainable. The obstacles preventing the realization of both these extreme states are of the same nature: they derive from our human condition, which is opposed to everything infinite. Our ever-insufficient knowledge of the future opposes it: and this is called, in the one instance, hope, and and in the other, uncertainty of the following day. The certainty of death opposes it: for it places a limit on every joy, but also on every grief. The inevitable material cares oppose it: for as they poison every lasting happiness, they equally assiduously distract us from our misfortunes and make our consciousness of them intermittent and hence supportable.