The funny thing is, people's perceptions of what a song is about is usually wrong a majority of the time. But they're still going to read what they want to into it.
There comes a point in your life when you realize how quickly time goes by, and how quickly it has gone. Then it really speeds up exponentially. With that, I think you start to put a lot of things into context; you start to see how huge the world is, and really, the universe.