Lyric discussion by ICPrice 

Cover art for Heaven Knows lyrics by Pretty Reckless, The

This song doesn't really seem to mean anything. It's very poorly constructed lyrically, and just seems to be an attempt to rhyme with a certain flow, but while stretching the verbage to bring meaning to what I assume was some kind of feeling. It seems the author was trying to write lyrics for a completed score, and felt a certain way or wanted to convey a feeling, but the lyrics are very incoherent and non sequiturial and do not complete a cohesive progression or story arc.

TL;DR: The lyrics don't make sense. This seems to be a 'radio song', with very little care for a meaning within the lyrics. High level of radio play was possibly the motivation instead of conveying a message.