I would rather be ashes than dust!
I would rather that my spark should burn out in a brilliant blaze than it should be stifled by dry-rot.
I would rather be a superb meteor, every atom of me in magnificent glow, than a sleepy and permanent planet.
The function of man is to live, not to exist.
I shall not waste my days trying to prolong them.
I shall use my time.
Words supposedly written by early-20th Century writer Jack London. Admittedly, he's basically taken six lines to say "you only live once" but he does it as poetically and eloquently as anyone ever has.
Except maybe whoever it was at Nike that came up with "Just Do It"...