Quote of the day, Gilles Deleuze on using theory

“"A theory is exactly like a box of tools. It has nothing to do with the signifier. It must be useful. It must function. And not for itself. If no one uses it, beginning with the theoretician himself (who then ceases to be a theoretician), then the theory is worthless or the moment is inappropriate. We don’t revise a theory, but construct new ones; we have no choice but to make others.”

in Intellectuals and power: A conversation between Michel Foucault and Gilles Deleuze