"The advice I give my students is the same advice I give myself—forget definition, forget assumption, watch. We inhabit, we are part of, a reality for which explanation is much too poor and small. No physicist would dispute this, though he or she might be less ready than I am to have recourse to the old language and call reality miraculous. By my lights, fiction that does not acknowledge this at least tacitly is not true. Why is it possible to speak of fiction as true or false? I have no idea. But if a time comes when I seem not to be making the distinction with some degree of reliability in my own work, I hope someone will be kind enough to let me know."