Great scientific minds, from Claudius Ptolemy of the second century to Isaac Newton of the seventeenth, invested their formidable intellects in attempts to deduce the nature of the universe from the statements and philosophies contained in religious writings.... Had any of these efforts worked, science and religion today might be one and the same. But they are not.

These are two different exercises. One of them is, "You don't know and I know, so just shut up and listen," and the other one is, you're curious and you're learning, and I have a way where you can learn this so you'll know it as well. And when you know it, and know why you know it, then you don't have to reference me ever again because you take ownership of the knowledge, and you can then share it with someone else.

The center line of science literacy - which not many people tell you, but I feel this strongly, and I will go to my grave making this point - is how you think.

That is a cosmic perspective, that's correct. And in tandem with that, you will never find people who truly grasp the cosmic perspective such as the entire community of astrophysicists leading nations into battle. No, that doesn't happen. When you have a cosmic perspective, there's this little speck called Earth and you say you're going to do what? You're on this side of a line in the sand and you want to kill people for what?

When you innovate, you create new industries that then boost your economy. And when you create new industries and that becomes part of your culture, your jobs can't go overseas because no one else has figured out how to do it yet.

In any city with lots of skyscrapers, lots of skyline, the moon seems bigger than it is. It's called the moon illusion.

In the first year of a child's life we teach them to walk and talk. And then for the rest of their lives we want them to sit down and be quiet.