If at age 20 you are not a Communist then you have no heart. If at age 30 you are not a Capitalist then you have no brains.

I'm only a beer teetotaler, not a champagne teetotaler; I don't like beer.

Martyrdom is the only path to immortality that requires no talent whatsoever.

Social progress takes effect through the replacement of all institutions by new ones; and since every institution involves the recognition of the duty of conforming to it, progress must involve the repudiation of an established duty at every step.

I hate the poor and look forward eagerly to their extermination.

If history repeats itself, and the unexpected always happens, how incapable must Man be of learning from experience.

No community has ever yet passed beyond the initial phases in which its pugnacity and fanaticism enabled it to found a nation, and its cupidity to establish and develop a commercial civilization.