I think objectivity is like this strange myth that people think you're supposed to achieve, but actually, the dirty little secret is that it's not attainable any more than pure justice is attainable by the courts.

Of the primary emotions, fear is the one that bears most directly on survival. Children show fear. Adults try not to, maybe because it's shameful, or, in some circumstances, dangerous. The fear response is automatic, though, and your body runs through its reflexes whether you want it to or not.

Combat isn't where you might die -- though that does happen -- it's where you find out whether you get to keep on living. Don't underestimate the power of that revelation. Don't underestimate the things young men will wager in order to play that game one more time.

My wife, Daniela, and I live in an old house from 1810 with three fireplaces at the end of a dead-end dirt road on Cape Cod, so I turn the trees into firewood for us and a friend of mine sells the rest.

I would never want to pass a law limiting freedom of speech, but that doesn't mean we have to condone statements that undermine basic national unity and respect. Imagine being asked to defend a country where some citizens say the man in the White House isn't their president. Or a major presidential contender accuses the commander in chief of not even being a U.S. citizen. Those kinds of statements erode trust in our democracy, and it's up to both parties to publicly reject them. We have to restore confidence that we are a nation that loves and believes in itself.

At 19, your brain hasn't finished wiring itself. So the first time you have a good friend die, most people don't go through that at 19. Soldiers do. They're facing life in this accelerated, compressed form, and a lot of times, they're not ready for it.

In some ways, risk-taking is the ultimate act of self-indulgence , an obscene insult to the preciousness of life. And yet, how can one dismiss something that persists despite every reasonable theory that it shouldn't?