I am an optimist... I choose to be. There is a lot of darkness in our world, there is a lot of pain and you can choose to see that or you can choose to see the joy. If you try to respond positively to the world, you will spend your time better.

If you can run around the corner and say hello to someone do that instead of emailing. It's always more rewarding; the connection is always more authentic. If you've got something to say and you can say it someone's face, it's so much better, healthier.

The best revenge against bullies is absolutely, resolutely, never to let them change who you are. Know that whatever bullies say or do - it comes from their weakness, not yours.

What I learned in Guinea is that we are all responsible for the state of our world. The world - and the system by which we trade, share, cooperate and conflict - is clearly not working. We are only as strong as our weakest members. UNICEF is run at every level by strong, relentlessly energetic, deeply capable people who use that strength, energy and capability to help those who need it most: the weakest, most disadvantaged women and children of our world. All I can do now is help make people aware of what is happening, of what they are doing. That is all that I can do. For now.

Every time you consider a job, you have to check in with your inner compass and say, ‘Does this fit in with how I see what the work is for? Is this going to be something interesting and valuable to contribute to the world?’

All acting is an act of imagination. You are simply conjuring up imaginary circumstances in your mind and responding truthfully to them.

Everythings a choice. Nobody's born good. Nobody's born evil. It's always a choice.