I'm not sure what it would mean to have "made it." Made what? Yes, I can make a decent living in show business, so if that's the criteria, then I've made it. But that doesn't feel that important to me. The stuff that matters to me are the new challenges. I know that sounds hokey, but it's true.

By the end of the time I'm writing a book, I'm tearing my hair out and I want to go do stand-up. And then I want to do something else. I don't know why it is true with me that I can't just be satisfied doing the one thing, but I'm constantly flitting from one thing to another.

It's such a deliberate thing to sit down and write a tweet. You're putting yourself out there in a very deliberate way, and over however many tweets, you start to create a character for yourself.

There is no word for feeling nostalgic about the future, but that's what a parent's tears often are, a nostalgia for something that has not yet occurred. They are the pain of hope, the helplessness of hope, and finally, the surrender to hope.

I imagine there's a level of narcissism that goes into thinking you're enough.

Kids love to be silly, they love to laugh, so I think it was natural for my kids to like the sort of books that I write - and it's the only kinds of books I'm capable of writing.

I think writing for anybody helps you order your life. It helps you arrange your emotions and your thoughts and it helps to provide perspective.