I laugh almost everyday. I have a good sense of humor, so I'm always finding something funny.

I believed Afghanistan was always going to be hard. It's the fifth poorest country in the world. And when you fly over it, you realize that there's not much there. And, of course, it has the problem, too, of being on that border with Pakistan in basically an ungoverned region that has given the terrorists a staging ground. So it's a very difficult place. But I do believe that the mission there can succeed if success is defined as helping the Afghans to prevent the Taliban from being an existential threat to the Afghan government.

Life is full of surprises and and serendipity. Being open to unexpected turns in the road is an important part of success. If you try to plan every step, you may miss those wonderful twists and turns. Just find your next adventure-do it well, enjoy it-and then, not now, think about what comes next.

The U.S. has since the end of World War II had an answer - we stand for free peoples and free markets, we are willing to support and defend them - we will sustain a balance of power that favors freedom.

Every life is worthy and every life is capable of greatness. We have an obligation to make sure that opportunity for greatness is there.

You do have to keep in mind as you're going through extraordinarily difficult circumstances, that if you stay true, true to your values, if you stay true to your principles, if you believe in these values, then you can work in that context to right policies that may not be working.

Truly remarkable leadership is not just about motivating others to follow, it's about inspiring them to become leaders themselves and setting the stage for even greater opportunities for future generations.