Below is a poem that has nothing to do with the song, though, maybe this poem inspired the song.
But, only the songwriter knows for sure. I found this poem on the internet.
The story goes that this poem was written on a prison cell wall by someone on death row. They don't know who wrote it, apparently he's not living any longer to claim his rights to it. They're just not sure, out of all those that had that cell who wrote this poem.
But, it goes to show you, that it's never too late to change.