Never betraying a friend in prison.

Melissa, to have the opportunity in my life to serve my country for 10 years as Minister of Finance and Planning was the best gift that my life gave to me. I was born under the colonial period. I experienced the independence of my country.

Yes, I do, and I like to be seen by fans like this. Being a legend for my fans and my family is something I can be proud of, as I had the opportunity to play in World Cups myself, so I knew what the squad were feeling. I have the third highest appearances for Argentina, for whom many very talented footballers have played, so it’s an honour. To me, representing my home country anywhere in the world has been the best feeling.

Stepping onto an Olympic podium was such a unique moment, and I guess it would be one of the proudest of my career. I had dreamed about it since I was a kid.

People ask me sometimes, who inspires you, Mr. President? Those quiet heroes all across this country -- some of your parents and grandparents who are sitting here -- no fanfare, no articles written about them, they just persevere. They just do their jobs. They meet their responsibilities. They don't quit. I'm only here because of them. They may not have set out to change the world, but in small, important ways, they did. They certainly changed mine.

It's hard - truthfully the main thing other than work is just making sure that I'm spending enough time with michelle and the girls. The big advantage I have is that I live above the store - so I have no commute! So we make sure that when I'm in DC I never miss dinner with them at 6:30 pm - even if I have to go back down to the Oval for work later in the evening. I do work out every morning as well, and try to get a basketball or golf game in on the weekends just to get out of the bubble.

There are some things about being president that I still have difficulty doing. … For example, faking emotion. Because I feel it is an insult to the people I'm dealing with. For me to feign outrage, for example, feels to me like I'm not taking the American people seriously. I'm absolutely positive that I'm serving the American people better if I'm maintaining my authenticity. And that's an overused word. And these days people practice being authentic. But I'm at my best when I believe what I am saying.

My daughters are something, and they just surprise and enchant and impress me more and more every single day as they grow up. And so these days, when we talk, we talk as parent to child, but also we learn from them.

I would end every night reading these ten letters. It made the numbers and the policies very concrete and very specific. And I was reminded that the choices we were making were affecting millions of people. I found that to be very useful.

And finally, change requires more than just speaking out -- it requires listening, as well. In particular, it requires listening to those with whom you disagree, and being prepared to compromise. When I was a state senator, I helped pass Illinois's first racial profiling law, and one of the first laws in the nation requiring the videotaping of confessions in capital cases. And we were successful because, early on, I engaged law enforcement.