I can't think of a 30- or 40-year-old who can behave like Mugabe. They wouldn't even know where to begin, and given their own educational exposure, I think it will be very positive for Africa.

If you have a problem and you can't find a solution, you meet again tomorrow and you keep talking until you find a solution. You can disagree with behavior or a particular position, but you do not resort to calling an opponent worthless.

Sometimes I walk into a situation and I know somebody is going to provoke me - not maybe, I know he will provoke me - I know he will provoke me! And there are times when I simply refuse to be provoked. And the other times you have to use that superior knowledge to carry on at work without distraction, and don't allow yourself to be distracted. I laugh a lot inside and outside, and at myself sometimes.

The global HIV/AIDS epidemic is an unprecedented crisis that requires an unprecedented response. In particular it requires solidarity - between the healthy and the sick, between rich and poor, and above all, between richer and poorer nations. We have 30 million orphans already. How many more do we have to get, to wake up?

We're all human. After 10, 15 years you get tired, you run out of steam and ideas, you have to give a chance to somebody else. And whether you yourself are inclined to stay on, all those around you are pushing you to stay on for what they will gain.

These divisions in the international community - the Syrians bear quite a lot of the blame, but we have enabled it by the divisions between us.

I urge you to celebrate the extraordinary courage and contributions of refugees past and present.