“Merely quantitative differences, beyond a certain point, pass into qualitative changes.”

“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]”

“The theoretical conclusions of the Communists are in no way based on ideas or principles that have been invented, or discovered, by this or that would -be universal reformer. They merely express, in general terms, actual relations springing from an existing class struggle, from a historical movement going on under our very eyes. The abolition of existing property relations is not at all a distinctive feature of communism. All property relations in the past have continually been subject to historical change consequent upon the change in historical conditions.”

“In the social production of their existence, men inevitably enter into definite relations, which are independent of their will, namely relations of production appropriate to a given stage in the development of their material forces of production. The totality of these relations of production constitutes the economic structure of society, the real foundation, on which arises a legal and political superstructure and to which correspond definite forms of social consciousness. The mode of production of material life conditions the general process of social, political and intellectual life. It is not the consciousness of men that determines their existence, but their social existence that determines their consciousness. At a certain stage of development, the material productive forces of society come into conflict with the existing relations of production or – this merely expresses the same thing in legal terms – with the property relations within the framework of which they have operated hitherto. From forms of development of the productive forces these relations turn into their fetters. Then begins an era of social revolution. The changes in the economic foundation lead sooner or later to the transformation of the whole immense superstructure.”

“If anything is certain, it is that I myself am not a Marxist.[In a letter about the peculiar 'Marxism' which arose in France 1882]”

“The new era differs from the old chiefly in that the lash begins to imagine itself possessed of genius.”

“Surround yourself with people who make you happy. People who make you laugh, who help you when you’re in need. People who genuinely care. They are the ones worth keeping in your life. Everyone else is just passing through.”