Wow, it's so very hard to narrow the list down to twenty, let alone just one!!!
I guess if I could only choose just one "best" rock-n-roll song I'd pick ..... damn it I'm having a hard time here.
OK, I'd have to choose "Free Four" (Pink Floyd - Obscured By Clouds) for a couple of reasons:
1. The line "The memories of a man in his old age are the deeds of a man in his prime" is a simple but powerful reminder that we are what we DO to and for others, not what we THINK of ourselves. What we do and what we say have an impact on everything we know of the world and also on the way we perceive ourselves inside that world. Be careful what you do yet be carefree at the same time. Live life fully but don't tread on others.
2. I'm a HUGE Pink Floyd fan so I pretty much had to pick a song from that band.
