" Just as one's accomplishments shouldn't be limited by birth, marriage isn't about who you are, it's about what you do."
People spend a lot of time considering who they are, how they're defined, and trying to define themselves in a lot of different ways. But when it comes to relationships, your actions and choices are what matters, and this is how to make or break a marriage.
The Obamas actually paint a pretty unglamorous portrait of their marriage, but it works because they're both committed to making the choices that are necessary to keep it together. What a great, unselfish example of commitment!