Whether or not you can never become great at something, you can always become better at it. Don't ever forget that! And don’t say “I’ll never be good”. You can become better! and one day you’ll wake up and you’ll find out how good you actually became.

Doing what has never been done before is intellectually seductive, whether or not we deem it practical.

The caricature of science is that we hold tight to the theories we have, and shun challenges to them. That's just not true. In fact, we hold our highest rewards for those scientists who can prove others wrong. And by the way, they are famous in their own lifetimes. We don't wait until they're dead.

A state of negative energy means that you are essentially getting something for nothing.

Next time you're stunned by a large moon on the horizon, bend over and view it between your legs. The effect goes away entirely.

Chimpanzees are an evolutionary hair's-width from us.... Now imagine a species on Earth, or anywhere else, as smart compared with humans as humans are compared with chimpanzees. How much of the universe might they figure out?

85 percent of the gravity of the universe has a point of origin about which we know nothing.