Although gold and silver are not by nature money, money is by nature gold and silver.

I am greatly pleased with the public, authentic isolation in which we two, you and I, now find ourselves. It is wholly in accord with our attitude and our principles.

Philosophy is to science as masturbation is to sex.

History does nothing; it does not possess immense riches, it does not fight battles. It is men, real, living, who do all this.

The ideas of the ruling class are in every epoch the ruling ideas, i.e., the class which is the ruling material force of society, is at the same time its ruling intellectual force.

All science would be superfluous if the outward appearance and the essence of things directly coincided.

A people without a heritage are easily persuaded.