For me, what fun means is finding novelty in the suffocating familiarity of ordinary life.

Even when we tell kids to go play, what do the kids do? They come up with a set of constraints and structures. "Oh, we're gonna build a fort out of clothes, and now that we're in the fort we're going to pretend that we're prisoners," or whatever.

We're stuck in these situations with other people and our stuff and our jobs, and thinking that we can extract ourselves from those seems doomed to me. Instead, how can we live within those systems of constraints? We don't have to enjoy them, exactly, but at least acknowledge that those boundaries are real and that they structure our response to the world. And then once you do that, you allow yourself to say "I did my best given the circumstances."

The universe is not particularly concerned with you.

I think the most important thing to realize about play is that it's this thing that's in stuff, it's not in you.

Today, all our wives and husbands have Blackberries or iPhones or Android devices or whatever-the progeny of those original 950 and 957 models that put data in our pockets. Now we all check their email (or Twitter, or Facebook, or Instagram, or) compulsively at the dinner table, or the traffic light. Now we all stow our devices on the nightstand before bed, and check them first thing in the morning. We all do. It's not abnormal, and it's not just for business. It's just what people do. Like smoking in 1965, it's just life.

Play is this process of operating the world, of manipulating things. It's related to experimentation, and it's related to pleasure, but not defined by it.