"If you can fill the unforgiving minute with sixty seconds' worth of distance run,
Yours is the Earth and everything that's in it, and - which is more - you'll be a Man, my son!"
Dennis Hopper on Johnny Cash's show in 1970. There are other recordings of him reciting Kipling's poem during different stages of his life; all are interesting to watch. One can tell that he really took it to heart.
Rest in Peace.