When do you engage?  Always, sometimes, never. What is the staw that breaks your back, or have you never reached that point? Why not? To clarify somewhat, do you feel the need to say something to a person when they say "god bless you" to you? This is personal, one on one, face to face. Most who say this don't mean anything more than to wish you well. It's just their world view, how they've been r…