Philosophy is to science as masturbation is to sex.

The education of all children, from the moment that they can get along without a mother's care, shall be in state institutions.

The alienation of man thus appeared as the fundamental evil of capitalist society.

Labour is ... not the only source of material wealth, i.e, of the use-values it produces. As William Petty says, Labour is the father of material wealth, the earth is its mother.

The class struggle necessarily leads to the dictatorship of the proletariat.

When the sufferers learn to think, then the thinkers will learn to suffer.

The wealthy man is the man whois much, not the one who has much