What keeps me awake at night is just, Am I making the best use of the time that remains for me, to both be as good an example as I can in my own daily life, and as compelling as possible a voice for the ways in which we can all work together to tackle these issues.

We came together [with King Hussein of Jordan] because of a shared sense of idealism, of the value of service to a community far greater than ourselves, and the conviction that each and everyone of us can meaningfully contribute to solving even the most seemingly intractable problems.

King Hussein of Jordan dedicated his life - I witnessed it in his sleeping as well as waking hours - to trying to break through the impasses keeping people apart. He understood that the security and prosperity of any one of us in this world depends on the security and prosperity enjoyed by others. As Martin Luther King said, "Injustice anywhere is a threat to justice everywhere." In the Middle East, nothing could be more true.

If we are to prosper together in our increasingly small world, we must listen to -- and learn from each other's stories

My early childhood was spent living by the Pacific Ocean. I carry with me something imprinted by that wide, limitless horizon, which I learned connected us to different people and cultures, including my own family's origins in the Arab World and Northern Europe. I understood early that my world was only a small part of a much larger one. That captivated me.

A more just world is possible.

The killing of innocent people is a sin.