To say that ‘life’s a joke’ is not so much to belittle life as to correctly identify the elusive nature of the joke. Jokes have the measure of us. They change in the telling, defy capture, slip through our fingers like water. And they outlast us all. They are trifles, fragments, nothings that turn out to be all that’s left: the aptest metaphor for our pathetic species’ struggle to survive.