"In my opinion, then, Marxism is an instrument of research and discovery; it is valid only if one makes use of it. […] We must use it to discover what is new in the world. It is not a system or a dogma but a reference. Marxism is a method that, on the one hand, depends on a certain number of determined concepts, but, on the other hand, is analytic and critical of a certain historical process of becoming. […] Moreover, there is a strategic objective: to change the world. It is this imperative that leads us to introduce notions and ideas not found in Marx’s thinking."
- Henri Lefebvre, ‘Towards a Leftist Cultural Politics: Remarks Occasioned by the Centenary of Marx’s Death’ (via aidsnegligee)