Every possession and every happiness is but lent by chance for an uncertain time, and may therefore be demanded back the next hour.

My idea is that every specific body strives to become master over all space and to extend its force (—its will to power:) and to thrust back all that resists its extension. But it continually encounters similar efforts on the part of other bodies and ends by coming to an arrangement (“union”) with those of them that are sufficiently related to it: thus they then conspire together for power. And the process goes on—

The history of human thought recalls the swinging of a pendulum which takes centuries to swing. After a long period of slumber comes a moment of awakening. Then thought frees herself from the chains with which those interested — rulers, lawyers, clerics — have carefully enwound her.
She shatters the chains. She subjects to severe criticism all that has been taught her, and lays bare the emptiness of the religious political, legal, and social prejudices amid which she has vegetated. She starts research in new paths, enriches our knowledge with new discoveries, creates new sciences.
But the inveterate enemies of thought — the government, the lawgiver, and the priest — soon recover from their defeat. By degrees they gather together their scattered forces, and remodel their faith and their code of laws to adapt them to the new needs.

So every man ought to be asking himself, “Am I really a man who is entitled to act in such a way that the entire human race should be measuring itself by my actions?” And if he does not ask himself that, he is masking his anguish.