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

When the train of history hits a curve, the intellectuals fall off.

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.

Music is the mirror of reality.

The burgeoisie, by the rapid improvement of all instruments of production, by the immensely facilitated means of communication, draws all nations into civilization.

Russia is a name usurped by the Muscovites. They are not Slavs; they do not belong to the Indo-Germanic race at all, they are des intrus [intruders], who must be chased back across the Dnieper, etc.

Both for the production on a mass scale of this communist consciousness, and for the success of the cause itself, the alteration of men on a mass scale is necessary, an alteration which can only take place in a practical movement, a revolution; this revolution is necessary, therefore, not only because the ruling class cannot be overthrown in any other way, but also because the class overthrowing it can only in a revolution succeed in ridding itself of all the muck of ages and become fitted to found society anew.