How do you know the nature of another person: who she is, or what she is capable of? In four exploratory essays, a seasoned historian examines the mechanisms by which ancient people came to have knowledge--not of the world and its myriad processes but about something more intimate, namely the individuals they encountered in close quarters, those they knew in everyday life. Tracing previously unfathomed structures beneath the surface of late ancient Christianity, Ellen Muehlberger reveals surprising insights about the ancient world and, by extension, the modern. Things Unseen holds treasures for scholars of early Christian studies, for historians in general, and for all those who wonder about how we know what we seem to know.