[S]ometimes joy multiplies itself dangerously. Children are the infamous example. Isn’t it bad enough that the beloved, with whom you have experienced genuine joy, will eventually be lost to you? Why add to this nightmare the child, whose loss, if it ever happened, would mean nothing less than your total annihilation? It should be noted that an equally dangerous joy, for many people, is the dog or the cat, relationships with animals being in some sense intensified by guaranteed finitude. You hope to leave this world before your child. You are quite certain your dog will leave before you do. Joy is such a human madness.

The writer Julian Barnes, considering mourning, once said, “It hurts just as much as it is worth.” In fact, it was a friend of his who wrote the line in a letter of condolence, and Julian told it to my husband, who told it to me. For months afterward these words stuck with both of us, so clear and so brutal. It hurts just as much as it is worth. What an arrangement. Why would anyone accept such a crazy deal? Surely if we were sane and reasonable we would every time choose a pleasure over a joy, as animals themselves sensibly do. The end of a pleasure brings no great harm to anyone, after all, and can always be replaced with another of more or less equal worth.