...(in the army) you're forced to learn the most important lesson in life, and that's the fact that you have to live up to your responsibilities, and you better do it right. When given an order, you can't say no. It's no exaggeration to say that lives are on the line. One wrong decision, and your buddy might die. It's this fact that makes the army work. That's the big mistake a lot of people make when they wonder how soldiers can put their lives on the line day after day or how they can fight for something they may not believe in. Not everyone does. ...but when all is said and done, we do what we do for one another. For friendship. Not for country, not for patriotism, not because we're programmed killing machines, but because of the guy next to you. You fight for your friend, to keep him alive, and he fights for you, and everything about the army is built on this simple premise.
Nicholas Sparks