Beware of false knowledge; it is more dangerous than ignorance.

To endure the pain of living, we all drug ourselves more or less with gin, with literature, with superstitions, with romance, with idealism, political, sentimental, and moral, with every possible preparation of that universal hashish: imagination.

I ... must continue to strive for more knowledge and more power, though the new knowledge always contradicts the old and the new power is the destruction of the fools who misuse it.

The only person who acts sensibly is my tailor. He takes my measure anew every time he sees me. Everyone else goes by their old measurements.

What is virtue but the Trade Unionism of the married?

Although I cannot lay an egg, I am a very good judge of omelettes

Hatred is the coward's revenge for being intimidated.