Visiting someone in a hospital recently, I watched an elderly couple. The man was in a wheelchair, the wife sitting next to him in the visitors' room. For the half-hour that I watched they never exchanged a word, just held hands and looked at each other, and once or twice the man patted his wife's face. The feeling of love was so thick in that room that I felt I was sharing in their communion and was shaken all day by their pain, their love, something sad and also joyful: the fullness of a human relationship.