" I know this much: that there is objective time, but also subjective time, the kind you wear on the inside of your wrist, next to where the pulse lies. And this personal time, which is the true time, is measured in your relationship to memory. So when this strange thing happened—when these new memories suddenly came upon me—it was as if, for that moment, time had been placed in reverse. As if, for that moment, the river ran upstream. "

― Julian Barnes , The Sense of an Ending