The child enters. "Knock knock" "Who's there?" The father wonders at the enduring appeal of jokes, the older we get the fewer we hear. The child grins through the setup, knowing that it's worked all day long friend to friend playground & cafeteria, a center stage moment he's rehearsed & honed. The child delivers the punch. There's more ah than ha at first before the father shifts from discovery to joy. They laugh together. Let there always be shared moments like this, an assurance for each, a luxuriating in who's there and why. May the doors to their hearts always be open to each other. This is inspired by a writing challenge that Matthew Olzmann gave my students--write a poem that begins with a joke and ends with a prayer. Photo of Diego Rivera with his child here.