I'm aware of the lyrics. I only listen to a select few songs of theirs that are feel good and promote moral standards and values, but Hayley herself is Christian. She's said it many times in interviews, has song many Christian songs, and even ad libs some of her own versus to include Christian allusions and references. One of her live renditions of her song, "Let the flames begin", has the ad lib "Father, father, protect me, Jesus, save us" etc etc. Song was written when she was at a low point in her life, sorta like what I'm dealing with now.
Examples are their songs that are very clean (I can understand the skepticisim in the song "Careful") are "Hate To See Your Heart Break" and "All I Wanted"
Hate to see your heart break goes without saying -- people don't like to see you broken hearted, and that you have a lot to live for. Don't dwell on past mistakes but look to the future. The other band's song, "All I wanted" is basically talking about Hayley trying to live for the world, but how it ended up ruining her. She then realized all she ever really wanted was God but instead, she had the world fill the void that God should inherently have.