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.

Communism is the riddle of history solved, and it knows itself to be this solution.

Philosophy studies the world, but the point is to change it.

It's possible that I shall make an ass of myself. But in that case one can always get out of it with a little dialectic. I have, of course, so worded my proposition as to be right either way.

This young lady, who instantly overwhelmed me with her kindness, is the ugliest creature I have seen in my entire life, with repulsive Jewish facial features.

Very well then; emancipation from usury and money, that is, from practical, real Judaism, would constitute the emancipation of our time.

Modern bourgeois society with its relations of production, of exchange, and of property, a society that has conjured up such gigantic means of production and of exchange, is like the sorcerer, who is no longer able to control the powers of the nether world whom he has called up by his spells.