But that there is a simple relation between literary and other fictions seems, if one attends to it, more obvious than has appeared. If we think first of modern fictions, it can hardly be an accident that ever since Nietzsche generalized and developed the Kantian insights, literature has increasingly asserted its right to an arbitrary and private choice of fictional norms, just as historiography has become a discipline more devious and dubious because of our recognition that its methods depend to an unsuspected degree on myths and fictions. After Nietzsche it was possible to say, as Stevens did, that 'the final belief must be in a fiction.' This poet, to whom the whole question was of perpetual interest, saw that to think in this way was to postpone the End--when the fiction might be said to coincide with reality--for ever; to make of it a fiction, an imaginary moment when 'at last' the world of fact and the mundo of fiction shall be one. Such a fiction--the last section of Notes toward a Supreme Fiction is, appropriately, the place where Stevens gives it his fullest attention--such a fiction of the end is like infinity plus one and imaginary numbers in mathematics, something we know does not exist, but which helps us to make sense of and to move in the world. Mundo is itself such a fiction. I think Stevens, who certainly thought we have to make our sense out of whatever materials we find to hand, borrowed it from Ortega. His general doctrine of fictions he took from Vaihinger, from Nietzsche, perhaps also from American pragmatism.