The price we pay for anticipation of the future is anxiety about it

Somewhere, something incredible is waiting to be known.

It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring.

The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pies were made in the interiors of collapsing stars. We are made of starstuff.

Imagination will often carry us to worlds that never were. But without it we go nowhere.

I don't want to believe. I want to know.

The absence of evidence is not the evidence of absence.

The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.

We live in a society exquisitely dependent on science and technology, in which hardly anyone knows anything about science and technology.

For small creatures such as we the vastness is bearable only through love.

You have to know the past to understand the present.

If you are very helpful, no one may remember you, but never forget to be helpful anyway.

We'll let our friends be the peacekeepers and the great country called America will be the pacemakers.

That's the thing about empathy—even people with an abundance of it can run out.

Oh, yeah?" Leo growled. "Well, maybe you got the smoke, buddy, but I've got the fire.

I hope to see the bringing together of all the best educated people of the earth into a worldwide Congress of Scientists.

About me - I used to want to be a P.E. teacher, and kind of still do.

It never got ugly, although it got a bit strange at times.

Law never made men a whit more just; and, by means of their respect for it, even the well-disposed are daily made the agents of injustice.

Leaders must (1) define the business of the business, (2) create a winning strategy, (3) communicate persuasively, (4) behave with integrity, (5) respect others, and (6) act.

I'm just a very tough person when I go on the court, and I really don't want to lose.