a lot of your life is shaped by the opportunities you turn down as much as those you take up. - Bill Clinton

My heart swells when she walks in, the infant with the round face and enormous eyes reaching out to touch my face, the little girl lifting herself on her tippy-toes to kiss me with a PBJ-smudged face, the teenager slicing the air with her hand as she argued the merits of alternative-energy incentives at the state debate finals.

And I think America, if we're ever going to truly defeat terror without changing the character of our own country or compromising the future of our children, has got to not only say, "Okay, I want to shoulder my responsibilities, I want to create my share of opportunities" but we have to find a way to define the future in terms of a humanity that goes beyond our country, that goes beyond any particular race, that goes beyond any particular religion.

In other words, our constitution was designed by people who were idealistic but not ideological. There's a big difference. You can have a philosophy that tends to be liberal or conservative but still be open to evidence, experience, and argument. That enables people with honest differences to find practical, principled compromise. On the other hand, fervent insistence on an ideology makes evidence, experience, and arguments irrelevant: If you possess the absolute truth, those who disagree are by definition wrong, and evidence of success or failure is irrelevant. There is nothing to learn from the experience of other countries. Respectful arguments are a waste of time. Compromise is weakness. And if your policies fail, you don't abandon them; instead, you double down, asserting that they would have worked if only they had been carried to their logical extreme.