There are three levels of happiness: the pleasant life, the good life, and the meaningful life.

In 1920 [H.G. Wells] described human history as becoming more and more a race between education and catastrophe.

The Harvard Law of Animal Behavior holds that under controlled experimental conditions of temperature, time, lighting, feeding, and training, the organism will behave as it damn well pleases.

Today the story is no less attitude-adjusting. It is about the defining cultural, social and political issue of our age. It is about human transformation.

If you put a large switch in some cave somewhere, and a sign on it saying, "End-of-the-World Switch. PLEASE TO NOT TOUCH," the paint wouldn't even have time to dry.

Dwight D. Eisenhower changed America forever with the creation of the interstate highway program.

The essence of being human is being creative.

Transcendence is the only real alternative to extinction. This is serious. This may be the ultimate final exam.

In order for the Prevail Scenario to work ... you will have to have a world in which you have both differences between people and opportunities for intense connectedness.

The hallmark of the Renaissance was its holistic quality as all fields of art, engineering, science and culture shared the same exciting spirit and many of the same intellectual principles.

The next frontier is our own selves.

Conviction says, 'My behavior was wrong.' Satan, on the other hand, floods our hearts with shame. Shame says, 'There is something wrong with me.

Yet verily these issues lie on the lap of the gods.

I don't really care what's going on I just care about getting my job done the best that I can possibly do and deal with the other things in my life that take a lot of time and a lot of thought.

We never deceive people to benefit them, for knavery is a compound of wickedness and falsehood.

I'm scared. I'm excited. I'm ready for whatever happens but I think that fame is what comes along with the territory when you open yourself up and become this story, this book for anyone to read.

I don't like to hear myself sing. So to get comfortable hearing myself sing, I sang in another accent.

A mathematician is a device for turning coffee into theorems.

For a long while, I was really against Twitter. I mean, who cares if I'm in an airport or had broccoli for dinner?

I’ve always been a person who’s been true to myself and true to others and I’m not afraid to be honest.

When you're in a place, the details you focus on are different than details you focus on when you're writing about it.