I think the song should mean whatever you want it to.
Not getting too philosophical here, but I am sure writers didn't intend a 100% pure meaning for the song.
Expand the mind, imagine.
Personally I believe that this song represents growing up, leaving high school, etc.
Feeling nostalgic for the past, but at the same time awaiting the adventure that is bound to come in your life ahead.
I think the song should mean whatever you want it to. Not getting too philosophical here, but I am sure writers didn't intend a 100% pure meaning for the song. Expand the mind, imagine.
Personally I believe that this song represents growing up, leaving high school, etc. Feeling nostalgic for the past, but at the same time awaiting the adventure that is bound to come in your life ahead.