Some may still deny the overwhelming judgment of science.

When I touched my hand against the Western Wall and placed my prayer between its ancient stones, I thought of all the centuries that the children of Israel had longed to return to their ancient homeland. When I went to Sderot and saw the daily struggle to survive in the eyes of an eight-year-old boy who lost his leg to a Hamas rocket, and when I walked among the Hall of Names at Yad Vashem, I was reminded of the existential fear of Israelis when a modern dictator seeks nuclear weapons and threatens to wipe Israel off the face of the map - face of the Earth.

We're not going to baby sit a civil war.

We do not benefit from a relationship with China or any other country in which we put our values and our ideals aside.

I believe that the starting point of faith is some doubt, not bein' so full of yourself and so confident that you are right and that God speaks only to us and doesn't speak to others, that God only cares about us and doesn't care about others.

I'm not going to Wall Street [after the presidency]. The amount of time that I'll be investing in issues is going to be high. But it'll be necessarily in a different capacity.

There are always things that I think I wish I could have done better.