Once, I saw a remarkable series of photographs which showed the different compositions of human tears. It had not ever occurred to me until that moment that tears of joy might be measurably different from tears of anger or sorrow, but they are. Cause matters. If you cry from slicing an onion, the structure of your tears resembles the undergrowth in a pine forest. Remembrance is a grid pattern, like the map of New York City, but from each block emerge soft, questing tendrils, as if the body of the tear itself reaches out for what is lost. By comparison, other tears are plain. Elation is etiolated and fragile, grief is sparse, rage is linear, horror is jagged. Of all the pictures in the collection, only remembrance was complex.