People in long, happy marriages have won the lottery of life. They are the happy ones, the blessed ones. And that is the dream of marital union that lures us on. “What greater thing is there for two human souls,” George Eliot wrote in Adam Bede, “than to feel that they are joined for life—to strengthen each other in all labor, to rest on each other in all sorrow, to minister to each other in all pain, to be one with each other in silent unspeakable memories at the moment of last parting?”