Greek philosophy seems to have met with something with which a good tragedy is not supposed to meet, namely, a dull ending.

The method of production of the material things of life generally determines the social, political and spiritual currents of life.

Men's ideas are the most direct emanations of their material state.

Capitalist production, therefore, develops technology, and the combining together of various processes into a social whole, only by sapping the original sources of all wealth - the soil and the labourer.

The abolition of religion as the illusory happiness of the people is the demand for their real happiness. To call on them to give up their illusions about their condition is to call on them to give up a condition that requires illusions. The criticism of religion is, therefore, in embryo, the criticism of that vale of tears of which religion is the halo.

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

The only antidote to mental suffering is physical pain.