In this chapter I will, first, discuss the marriage of Christian theology and Neoplatonism which takes place in the mystical theology of Dionysius the Areopagite, and some of the problems which arise from this remarkably fruitful liaison. Then, second, I will trace the line of descent which leads from Dionysius to Žižek, who takes this inheritance and mutates it in ways which are potentially generative for theology and philosophy, both in relation to one another and to desire.