You realize that you may never see someone—a certain someone, say—again. Neither said anything about it, nor is moving to the other coast. But you don’t work at the same place, attend the same school, church, temple, or mosque; don’t live nearby. One of you lifts and bicycles indoors; the other jogs and walks and bikes outdoors: so chances of your managing to run into each other by sheer happenstance are low. So, like so many I have known, appreciated, maybe even more, another episode that fills the heart makes it feel hollower at the same time.