“Science is part of culture. Culture isn't only art and music and literature, it's also understanding what the world is made of and how it functions. People should know something about stars, matter and chemistry. People often say that they don't like chemistry but we deal with chemistry all the time. People don't know what heat is, they hardly know what water is. I'm always surprised how little people know about anything. I'm puzzled by it.”

“People say to write about what you know. I'm here to tell you, no one wants to read that, cos you don't know anything. So write about something you don't know. And don't be scared, ever.”

“Too many people who don't know anything about anything say too much about what they don't know.”

“Let me tell you, you either have chemistry or you don't, and you better have it, or it's like kissing some relative. But chemistry, listen to me, you got to be careful. Chemistry is like those perfume ads, the ones that look so interesting and mysterious but you dont even know at first what they're even selling. Or those menues without the prices. Mystery and intrigue are gonna cost you. Great looking might mean something ve-ry expensive, and I don't mean money. What I'm saying is, chemistry is a place to start, not an end point.”

“Which is the other reason hip-hop is controversial: People don't bother trying to get it. The problem isn't in the rap or the rapper or the culture. The problem is that so many people don't even know how to listen to the music.”

“Right now there's a commonly-held view among scientists that we know about only four percent of all the matter in the universe. Four percent!""So what about the other 96 percent?""We astrophysicists call it 'dark matter' and 'dark energy.' Maybe we should just call it ignorance. There's so much that we don't know. It's shocking how little we know. And yet we behave like little gods who think we're in control of everything. Like kids with delusions of grandeur. Isn't that what we've made ourselves into? It's as if we're trying to make ourselves believe that four percent is all there is. That everything else, all that we don't know, doesn't exist. But it does. We know it's there; we just don't understand it.”