Cain and Abel

This ol' train can’t seem to catch its breath
What town or plain that I’ve now strayed is only the moons guess
I thought my home was a stone inside my shoe
It leads me like light to see what I can find of you
I found that what I wrestled was not an angel, but still broke my ankle
I tied your dreams to the tracks before I moved
But woke up to find that what’s left of me is what’s still left of you
And the peace in your eyes when you cry
Makes me hope that true joy will come to me when I die
I found that when we wrestle, I fight like Cain, you fall like Abel
So why am I who’s left unstable?