Cash's version is amazing. It's one of those songs that really move you. I think it's a very relatable song, as it can be interpreted about any kind of addiction in general. Even small things like anger issues and dissapointing decision making can make you relatable to this song. That little line "I will let you down, I will make you hurt" just sinks in so deeply. Apologetic and unapologetic at the same time, like telling someone that you love "I will mess this up no matter what, I have a problem. This is what I am." It's very powerful.