Once it's been proved to you that you're descended from an ape, it's no use pulling a face; just accept it. Once they've proved to you that a single droplet of your own fat must be dearer to you than a hundred thousand of your fellow human beings and consequently that all so-called virtues and duties are nothing but ravings and prejudices, then accept that too, because there's nothing to be done. Notes from Underground

Suicide may also be regarded as an experiment -- a question which man puts to Nature, trying to force her to answer. The question is this: What change will death produce in a man’s existence and in his insight into the nature of things? It is a clumsy experiment to make; for it involves the destruction of the very consciousness which puts the question and awaits the answer. Parerga and Paralipomena

No feats of heroism are needed to achieve the greatest and most important changes in the existence of humanity; neither the armament of millions of soldiers, nor the construction of new roads and machines, nor the arrangement of exhibitions, nor the organization of workmen's unions, nor revolutions, nor barricades, nor explosions, nor the perfection of aerial navigation; but a change in public opinion. Patriotism and Christianity

[..] the values to which people cling most stubbornly under inappropriate conditions are those values that were previously the source of their greatest triumphs. Collapse: How Societies Choose to Fail or Succeed