We must admit with humility that, while number is purely a product of our minds, space has a reality outside our minds, so that we cannot completely prescribe its properties a priori.

I think most astronauts are not risk takers. We take calculated risks for something that we think is worthwhile.

While we've taken seeds into space, and astronauts on the International Space Station have eaten lettuce they've grown, we haven't produced fruit in space, so we can't pollinate something.

Sometimes people wonder why aeroplanes are so cheap and rockets are so expensive. Even the most superficial comparison shows one obvious difference: aeroplane engines use outside air to burn their fuel, while rockets have to carry their own oxidisers along.

Our society cannot progress while our constitution stands still.

Some pro-life advocates focus almost exclusively on the rights and suffering of the unborn baby, while some pro-choice advocates focus equally exclusively on the rights and suffering of pregnant women. This is a distortion of the moral choice that confronts us as a society.

In bourgeois society capital is independent and has individuality, while the living person is dependent and has no individuality.

It is pretty ironic that the so-called 'least advanced' people are the ones taking the lead in trying to protect all of us, while the richest and most powerful among us are the ones who are trying to drive the society to destruction.

Society is like a stew. If you don't stir it up every once in a while then a layer of scum floats to the top.

I've worn a chainmail suit to swim with sharks, glided over Cirencester with a James Bond-style paramotor strapped to my back, eaten hippo steaks and had a bat dive down my bra. And all the while, I had to face the camera and smile.

I had always thought of myself as a sanguine person, quite light and airy. But for a long while, no one could have possibly made me laugh or smile. It was awful.

Sometimes when I'm being photographed, I hear the voice of this photographer who told me when I was about six while he was taking my school photo that I didn't have a nice smile, and I shouldn't smile in photos.

I'm not the athlete I was when I was training for the Olympics in '92 or when I was working out every single day. I have to live in moderation: I work out three or four days a week, and I smile while I'm working out - I really do enjoy it. I work out with my girlfriends and make it a social competition.

I've been dealing with the press for 45 years. You need a very long spoon to sup with them. While you are always grateful, they are like badly trained dogs. They smile and wag and bite your arm off.

While journalists cannot right every wrong, champion every cause or fix every problem, they can - through the written word - lift someone's burden for a day, make some elderly woman on a bus smile or let them know they are noticed by someone.

The person that's always talkin', you don't have to worry about that person. The person that while you're in his face, he's just lookin' at you with a smile on his face, that's the guy you worry about.

If you're going to kill someone there isn't much reason to get all worked up about it and angry - you just pull the trigger. Angry discussions beforehand are a waste of time. We need to smile at Novell while we pull the trigger.

While you're improvising, you may come up with something which will break him up. As soon as that smile comes out, you know that, hey, we're having fun.

Tell me not of joy: there's none Now my little sparrow's gone; He, just as you, Would toy and woo, He would chirp and flatter me, He would hang the wing awhile, Till at length he saw me smile, Lord! how sullen he would be!

I used to rely on black-and-white, and while I was working on 'Smile,' I learned to adapt to color on my end.

I grew up in a household without a TV. We lived next door to a library for a while, and at one point, I checked out all the books in the fairy tale section. I remember the librarian's quiet smile as I'd bring back one stack and exchange it for another.

Let him who expects one class of society to prosper in the highest degree, while the other is in distress, try whether one side; of the face can smile while the other is pinched.

Y'know, smile, dance, get crazy... we sure do while we're making it, because music is our leeezshure; it's my fun.

Mind you, physical training doesn't necessarily mean going to an expert for advice. One doesn't have to make a mountain out of a molehill. Get out in the fresh air and walk briskly - and don't forget to wear a smile while you're at it. Don't over-do. Take it easy at first and build on your effort day by day.