In the Muslim world, this notion that somehow everything is the fault of the Israelis lacks balance - because there's two sides to every question. That doesn't mean that sometimes one side has done something wrong and should not be condemned. But it does mean there's always two sides to an issue. I say the same thing to my Jewish friends, which is you have to see the perspective of the Palestinians. Learning to stand in somebody else's shoes to see through their eyes, that's how peace begins. And it's up to you to make that happen.

I want to thank the Greek people publicly for their humanitarian response to the crisis of so many migrants and refugees seeking safety in Europe. Greeks, especially on the islands, have shown extraordinary compassion and they've rightly earned the admiration of the world.

We can have reasonable, thoughtful gun control measure that I think respect the Second Amendment and people's traditions.

My second piece of advice is to stay global. As the world continues to change and we become more connected to each other, globalization will bring both benefits and disruptions to our lives. But either way, it's here, and it's not going away.

If you go out and make some things happen, you will fill the world with hope.

The Internet and Twitter and all these things are very powerful, but it also means sometimes that instead of having a dialogue we just start calling folks - calling each other names. And that's true on the left or the right.

This week I've travelled more than 15,000 miles from America to China to Burma to Australia. I have no idea what time it is right now.