As I went to a Christian high school, I had to go to chapel services about three times a week, put on by the headmaster and the staff.  Well, the headmaster was definitely on in his years, and shade senile.  So, one day he was going on about how import it was for Christians to show themselves as different from the heathens of the world, necessitating the need to "dress like a Christian, act like a Christian," and yes true-believers, even to "smell like a Christian."

This showed up on the high school bulletin board the next day.. gosh, wonder who did it? ;)