I always thought it was about a new Christian praying for trials - not realizing that's a prayer that God likes to honor. and then being in the midst of a trial with God along side you.
"knock with caution at the door - they said - beware of what you're praying for..so i stand with my whole desire in the middle of this forrest fire till i've nothing left to show - and new love begins to grow"
it sounds like it's based on the scripture - James 1: 2-4 -
Consider it pure joy, my brothers and sisters, whenever you face trials of many kinds, 3 because you know that the testing of your faith produces perseverance. 4 Let perseverance finish its work so that you may be mature and complete, not lacking anything.

**everyone is broken**