Why you should take care in choosing songs for worship

Funny quote from Stanley Hauerwas:

One reason why we Christians argue so much about which hymn to sing, which liturgy to follow, which way to worship is that the commandments teach us to believe that bad liturgy eventually leads to bad ethics. You begin by singing some sappy, sentimental hymn, then you pray some pointless prayer, and the next thing you know you have murdered your best friend. (HT John Halton)

It seems hard to see how that could come about, but when it is your best friend who has chosen that insipid meaningless chorus for the twentieth time this year then perhaps you'd understand that it is probably for the best that he was prevented from making the same mistake again.