I just wanted to share a comment regarding the new song book released a few years ago. Whoever drew up the lyrics for this book knew what they were doing. It is a known fact that music is very powerful, by making use of repititive words or phrases, it has a powerful effect on the one singing the lyrics.
Music is a very powerful tool. For example, the word obey, in that song that goes always ready to obey, or whatever. That conditions the mind to do what the person is singing. I agree with what someone else said recently, is just do not sing the lyrics, if you are at the KH during the melodies.