I do keep up at night. I try not to let my mind go to extremes in the middle of the night because it would be better to turn all that stuff into dreams; it would be better if I was sleeping, because dreams become good metaphors for what's really going on inside of you.

The whole basis of working in black and white and grays became the basis of my understanding of color, because it's all about tone, it's all about light and dark. If you don't get that, then your color work is going to be a mess. So that's the beginning of the toolkit: drawing and black and white media.

You have to get through periods of being blocked. Everybody has them. For me, they have everything to do with self-doubt. It's never a matter of laziness or inability. It's just a matter of believing that what I'm doing is worthwhile, that it matters.I just make myself work. I just make myself go to work, whether I feel like it or not.

I feel sorry for kids nowadays, because in the majority of schools across the country, the arts have been eliminated from the curriculum. There's no art; there's no music. In some cases they've taken away the libraries. They don't do theater. And these are the things that speak to the human soul.

What I try to do in my picture books is to be all-inclusive, but not exclusive, to not exclude the kid and not exclude the parents from the experience. And it's not a very easy task; you can't find stories that work that way too much of the time.

By the time that book So You Want to Be President? came along, we had already had enough presidents that had shown us that presidents are human beings. So I felt I was contributing to the common knowledge there, but not revealing anything really new - sort of supporting what everybody already was suspicious of.

Leaders of the world, my message to you is simple: to achieve universal peace and understanding on this planet you have only to speak plainly, even though you may look foolish. This is a thousand times better than looking good and talking nonsense.