The universe is still a place of mystery and wonder.

In future, children won't perceive the stars as mere twinkling points of light: they'll learn that each is a 'Sun', orbited by planets fully as interesting as those in our Solar system.

Absence of evidence is not evidence of absence.

It will not be humans who watch the sun's demise, six billion years from now. Any creatures that then exist will be as different from us as we are from bacteria or amoebae.

I think a few hundred years from now we'll start having the 'posthuman' era of different species.

It's better to read first rate science fiction than second rate science-it's a lot more fun, and no more likely to be wrong.

We need to broaden our sympathies both in space and time - and perceive ourselves as part of a long heritage, and stewards for an immense future.

Science is a part of culture. Indeed, it is the only truly global culture because protons and proteins are the same all over the world, and it's the one culture we can all share.

I hope that by 2050 the entire solar system will have been explored and mapped by flotillas of tiny robotic craft.

I'm not myself religious but have no wish to insult or denigrate those who are.

Crucial to science education is hands-on involvement: showing, not just telling; real experiments and field trips and not just "virtual reality".

What are you waiting for? How long will you keep waiting? Don’t sit back and wait for life to happen to you. Have a plan and take the needed steps to create what you want.

A dream will always triumph over reality, once it is given the chance.

We had no more courage than Harriet Tubman or Marcus Garvey had in their times. We just had a more vulnerable enemy.

If it wasn't for baseball, I'd be in either the penitentiary or the cemetery.

Tell me I have to be somewhere, and I'll be there 20 minutes early and stay there longer than anybody else. You hold up a lot of people if you're not on time.

I said to my parents that I don't even know if there should be an Israel. And they were just so upset and hurt.

Virtue is everywhere that which is thought praiseworthy; and nothing else but that which has the allowance of public esteem is called virtue.

No one ever dies wishing they'd spent more time at the office.

Dads don't need to be tall and broad-shouldered and clever. Love makes them so.

The American people are pretty impressive in their ability to keep after something if they think it is doable.