The advance of liberty is the path to both a safer and better world.

Democracy will be transformative. It will help other societies realize the benefits of freedom. Nothing's as big as that, in terms of peace.

I wanted to come to Washington, D.C. and help be a transformative President. And I think history, when they look back, will say this is a fellow who knew how to make decisions, and made some tough ones, stood by them, wasn't driven by the latest opinion poll, but was driven by some core principles from which he would not deviate.

Running for president was a good decision.

Liberty can change habits.

Iran is obviously part of the problem. They sponsor Hezbollah. They encourage a radical brand of Islam.

Science is important, but so is ethics, so is balancing life. To destroy life to save life - it's one of the real ethical dilemmas that we face.