Philosophy stands in the same relation to the study of the actual world as masturbation to sexual love.

Philosophy is to the real world as masturbation is to sex

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.

The philosophers have only interpreted the world, in various ways; the point is to change it

All science would be superfluous if the outward appearance and the essence of things directly coincided. Das Capitol, Vol III, Ch.48

The philosophers have only interpreted the world, in various ways. The point, however, is to change it.

[These words are also inscribed upon his grave]