Art is always and everywhere the secret confession, and at the same time the immortal movement of its time.
The product of mental labor – science – always stands far below its value, because the labor-time necessary to reproduce it has no relation at all to the labor-time required for its original production.
Capital is dead labor, which, vampire-like, lives only by sucking living labor, and lives the more, the more labor it sucks.
A commodity appears at first sight an extremely obvious, trivial thing. But its analysis brings out that it is a very strange thing, abounding in metaphysical subtleties and theological niceties.
Social progress can be measured by the social position of the female sex.
The meaning of peace is the absence of opposition to socialism.
The ideas of the ruling class are in every epoch the ruling ideas, i.e., the class which is the ruling material force of society, is at the same time its ruling intellectual force.
Henceforth the leaves of the tree of knowledge were for women, and for the healing of the nations.
While the miser is merely a capitalist gone mad, the capitalist is a rational miser.
It is not history which uses men as a means of achieving – as if it were an individual person – its own ends. History is nothing but the activity of men in pursuit of their ends.