After the Berlin Wall came down I visited that city and I will never forget it. The abandoned checkpoints. The sense of excitement about the future. The knowledge that a great continent was coming together. Healing those wounds of our history is the central story of the European Union.

You don't have to be a brilliant historian to know that in Europe, messing with countries' borders, messing with their self-determination, their ability to choose their own futures, this is extremely dangerous, and that's why I think it is important to stand up to Putin.

I think the country requires fresh leadership. I do not think I can be the captain to take the country to its next destination.

I've said I'll stand for a full second term, but I think after that it will be time for new leadership. Terms are like Shredded Wheat - two are wonderful but three might just be too many.

I would love to be the African leader that steps down, that overthrows this idea of a Big Man ruler. I don't want to stay in office forever.

You can't lead a team and commit to something if you're constantly worried about your back falling out.

Not everybody is created equal, and it's important for companies to identify those high potentials and treat them differently, accelerate their development and pay them more. That process is so incredibly important to developing first-class leadership in a company.

The first responsibility of a leader is to define reality. The last is to say thank you. In between, the leader is a servant.