For those of you who don't know, while the use of song titles in a story is ok under Fair Use laws, using song lyrics is not; Song titles are fine, lyrics are covered as 'creative works' (unless in the public domain). Yes, I know I've done it before without realizing it, but it's not ok unless you have permission from the song's writers (as opposed to the performer).
Just a heads up.
http://annerallen.blogspot.com.au/2013/03/so-you-want-to-use-song-lyrics-in-your.html
You can’t truly call yourself peaceful unless you are capable of violence. If you’re not capable of violence, you’re not peaceful. You’re harmless.