Fight one more round. When your feet are so tired that you have to shuffle back to the center of the ring, fight one more round. When your arms are so tired that you can hardly lift your hands to come on guard, fight one more round. When your nose is bleeding and your eyes are black and you are so tired that you wish that your opponent would crack you one on the jaw and put you to sleep, fight one more round remembering that the man who always fights one more round is never whipped.
When you fight, you don't fight for abstract values like the flag, or the nation, or democracy. You fight for your buddy. You fight to keep him alive, and he fights to keep you alive, and you go on that way, day after day, battle after battle. And when one of your buddies dies, something inside you dies as well. But you go on. You fight, so that his death isn't meaningless, his sacrifice isn't for nothing.