The language of digital communication is a language we don't understand in a way. People say the internet is like the Wild West in that it's lawless and we haven't worked out how to make it structured or moral.

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.

True love is an acceptance of someone else for who they are.

I gave myself permission to care, because there are a lot of people in this world who are afraid of caring, or afraid of showing that they care because it's uncool. It's uncool to have passion. It's so much easier to lose when you've shown everyone how much you don't care if you win or lose. It's much harder to lose when you show that you care, but, you'll never win, unless you also stand to lose. Don't be afraid of your passion.

Stay hungry, stay young, stay foolish, stay curious, and above all, stay humble because just when you think you got all the answers, is the moment when some bitter twist of fate in the universe will remind you that you very much don't.

Loki in 'Thor' is the most incredible springboard into a sort of excavation of the darker aspects of human nature. So that was thrilling, coming back knowing that I'd built the boat and now I could set sail into choppier waters.

I find that, when I'm working, if I start the day with a run - outside, not in a gym, but just me out there in the elements, with only my own legs to propel me forward... It's something to do with just being in the world and getting out of my own head.