Everything factual is, in a sense, theory. The blue of the sky exhibits the basic laws of chromatics. There is no sense in looking for something behind phenomena: they are theory.

A well-bred carriage is difficult to imitate; for in strictness it is negative, and it implies a long-continued previous training.

Some people spend the day in complaining of a headache, and the night in drinking the wine that gives it.

Superstition is rooted in a much deeper and more sensitive layer of the psyche than skepticism.

The web of this world is woven of Necessity and Chance. Woe to him who has accustomed himself from his youth up to find something necessary in what is capricious, and who would ascribe something like reason to Chance and make a religion of surrendering to it.

He who serves the public is a poor animal; he worries himself to death and no one thanks him for it.

But one must know where one stands, and where the others wish to go.