The mind, in addition to medicine, has powers to turn the immune system around.

If all the insects were to disappear from the earth, within 50 years all life on earth would end. If all human beings disappeared from the earth, within 50 years all forms of life would flourish.

There is hope in dreams, imagination, and in the courage of those who wish to make those dreams a reality.

Good parents give their children Roots and Wings. Roots to know where home is, wings to fly away and exercise what's been taught them.

[Who owns the patent on this vaccine?] Well, the people, I would say. There is no patent. Could you patent the sun?

Risks, I like to say, always pay off. You learn what to do, or what not to do.

Your dreams tell you what to do; your reason tells you how to do it.

It is always with excitement that I wake up in the morning wondering what my intuition will toss up to me, like gifts from the sea. I work with it and rely on it. It's my partner.

I see the triumph of good over evil as a manifestation of the error-correcting process of evolution.

The most important question we must ask ourselves is, 'Are we being good ancestors?'

I feel that the greatest reward for doing is the opportunity to do more.

In humility imitate Jesus and Socrates.

The best weapon of a dictatorship is secrecy, but the best weapon of a democracy should be the weapon of openness.

Always behave as if nothing had happened, no matter what has happened.

If we can't have an open and honest debate about the value of ideas in a university in Glasgow, or Boston, or anywhere else in the world, then where are they going to go?

President Obama is launching a new $6 billion space policy that will ultimately take astronauts to Mars. Of course, it's $6 billion and $45 if the astronauts have a carry-on.

The most dangerous country for the U.S. now is Pakistan. ... We haven't been this vulnerable since the British burned Washington in 1814.

The way I look at a solo project is, I create what I want with whoever I want.

I know a way to stay friends forever, There's really nothing to it, I tell you what to do, And you do it.

The interior of the house personifies the private world; the exterior of it is part of the outside world.

Death is just a change in lifestyles.