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.
If you're bumming out, you're not gonna get to the top, so as long as we're up here we might as well make a point of grooving. (Quoting Scott Fischer)