Worry is a useless mulling over of things we cannot change.

Without a possibility of change in meanings human communication could not perform its present functions.

Normal social behavior requires that we be able to recognize identities in spite of change. Unless we can do so, there can be no human society as we know it.

Never doubt that you can change history. You already have.

If you want to have clean ideas, change them as often as your shirt.

I can't on my own change the regime in South Africa or teach the Palestinians to learn to live with the Israelies, but I can start with me.

When I was in first grade, everyone made fun of my name, of course. I think it's kind of a big name to hold up when you're nine years old. It seemed goofy. I used to tell people I wanted to change the world and they used to think, 'This kid's really weird'.

I can't change the world. I have to fix me.

I want to test my maximum and see how much I can do. And I want to change the world of swimming.

I want to be able to look back and say, 'I've done everything I can, and I was successful.' I don't want to look back and say I should have done this or that. I'd like to change things for the younger generation of swimmers coming along.

There has been a change in attitude, though.

If I could change on thing about myself, I would: Have better knees. Mine are shot because of injuries. You're only as good as your legs, whether you're an athlete or an actor.

Winners must learn to relish change with the same enthusiasm and energy that we have resisted it in the past.

Excellent firms don't believe in excellence - only in constant improvement and constant change.

I wouldn't change anything. I think that it's important to let things happen, and stay "happened". I think that's all part of the learning curve, part of fate. I'm just glad that it happened.