When a philosopher deals with another philosopher or philosophy, his or her stance is never the one of dialogue, but always the one of division, of drawing the line that separates truth from falsity – from Plato whose focus is the line that divides truth from mere opinion, up to Lenin obsessed with the line that separates materialism from idealism. The courses are an exercise in this art of delimination: their aim is to specify the contours of the dialectical-materialist notion of negativity by drawing a line that separates it from other forms of thought of negativity
Slavoj Žižek - Collected Recordings