I think that one of the hardest things for people these days is to come to Christ when they feel that they are so not worthy. God wants us the way we are (broken). He will do all the repair work. That is what the song is about.
Lyrics
So I'll sing for you Lord the best that I can, Because you've given so much to this man.
I hope you touch someone with the songs that I sing, you've bessed me oh Lord but why me.