When you have been with your partner for so many years, they become the glove compartment map that you've worn dog-eared and white-creased, the trail you recogonize so well you could draw it by heart and for this very reason keep it with you on journeys at all times. And yet, when you least expect it, one day you open your eyes and there is an unfamiliar turnoff, a vantage point taht wasn't there before, and you have to stop and wonder if maybe this landmark isn't new at all, but rather something you have missed all along.