After Johnny Cash woke up in Tennessee's Nickajack Cave in 1967, he had a spiritual epiphany. The Man in Black changed his life and recommitted himself to the Christian faith. Poulsen explained to Billboard
what drew him to Cash's turnaround.
"I could totally use that, because I think we as human beings struggle with different things in our lives - be it drugs or alcohol or a loss of a family member - where we dig ourselves into that dark place and don't know how to get out again. I've been there with alcohol and mourning the loss of my father. If it wasn't for a strong mind and some really good friends, I don't know where I'd be. But I found a way out of that dark place and now I'm enjoying life.
So ['Last Day Under the Sun'] is a song about hope and forgiveness and the way to come out on the other side, where there is light."