I think that people imagine protocol and etiquette as some kind of great dragon that hovers behind the pageantries of the palace to pounce on you and eat you up if you aren't behaving as you should. But in fact etiquette is saying how to do when you meet people, saying good night to your parents before going to bed, opening a door to a woman, getting up if an older person wants to sit down on the bus and it's all full, that is etiquette, or protocol, if you wish. At the everyday level, all the time, all of us. It's a way of knowing what you've got to do so that you have your mind free to do other things and think of other things.

Television documentary 'Queen Margrethe of Denmark', BBC & Jørgen Bonfils, 31:30, 28 April 1974 - Protocol