If we don't change from a world society that worships money and power to one that worships compassion and generosity, I think we'll be extinct by mid-century. I don't say that as an alarmist or as a pessimist.

If I am doing a good show and I am satisfied with it, and can convey a message or bring a change in the thought process of the society, my purpose is served.

Films can't change the society; they can simply open the space for the discussion which can lead to social change and can start new forms of social activism.

As much as any woman of the twentieth century, Madam Walker paved the way for the profound social changes that altered women's place in American society.

If you had no new technology, and you powered society as we do today - mostly by fossil fuels - you'd have only two choices: Doom yourself to horrific climate change by burning all that carbon and releasing all that CO2. Or power down society, reducing total energy usage around the planet.

I believe that, if managed well, the Fourth Industrial Revolution can bring a new cultural renaissance, which will make us feel part of something much larger than ourselves: a true global civilization. I believe the changes that will sweep through society can provide a more inclusive, sustainable and harmonious society. But it will not come easily.

I think football reflects our society. Our society changes. The evolution of society dictates the evolution of the game.

Today the world changes so quickly that in growing up we take leave not just of youth but of the world we were young in.

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.

It doesn't all have to be about giving money. Sometimes it's a smile that changes the life of one little kid.

When I walk into a gym full of kids, I could be having the worst day possible, but once you see the kids smile it changes your whole day around.

Yes, people used to recognise me even during the initial days of my career as I am an actor. But now they have started approaching me with a smile and share their happiness with me. This change is all because of my humorous roles.

I'm just trying to find ways to give back and use my platform to put a smile on other people's faces and ultimately make change.

If you don't like your job, then change it by getting some better skills. Until then, shut up and get my burger with a smile, like in the commercials.

The very best hotel I've stayed in is the Intercontinental on Park Lane. We went there for the Chelsea Flower Show a few years ago, and it was sheer luxury. Everybody had a smile on their face. I came home and changed all my pillows because the hotel ones were so beautiful.

Seeing Michelle Obama's bright color choices, and how she made people smile and reinforced Obama's platforms of hope and change, was inspiring.

If you walk down the street and smile at someone, that will get passed on to the next person. That has the power to change someone's day.

So, my style has hopefully changed over the years and it is more relaxed, and I do tend to smile and have more than one expression these days hopefully - which I didn't at the beginning.

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.

I don't know why my smile has become a signature pose. I think it's a nice change. I think people want to see happiness, so a smile is what can bring that. I didn't make it my trademark on purpose.

The spotlight, attention, all that doesn't really matter. You go home to your daughter, even after a loss when you're upset and you don't want to talk to anybody. You see her crack that smile, and it changes your day.

God made me the way I am for a reason and I would never change that. I lead a normal life as much as possible and deal with the bumps in the road as they come along with my head held high and a smile on my face!

I am generally a very happy and easygoing person. I also believe it's always better to meet people with a smile rather than looking cold, especially when you first meet. It changes everything.

Many people, including myself, had our scientific lives changed by the inspiring new vision of science that Popper gave us.