The quotidian demands of life distract from this resonance of images and events, but some of us feel it always. And who among us, offered the chance, would not relive the day or hour in which we first knew love, or ecstasy, or made a choice that forever altered our future, negating a life we might have had? Such chances are rarely granted. Memory and grief prove Faulkner right enough, but Einstein knew the finality of action. If I cannot change what I had for lunch yesterday, I certainly cannot unmake a marriage, erase the betrayal of a friend, or board a ship that left port twenty years ago. And