This week on Game of Thrones, Lord Varys tells Tyrion a riddle about three great men and a common sellsword, the answer of which tells us everything we need to know about the show. The point of the riddle is that power is an illusion and that perception is more important than reality. If people see you as powerful, then you are. This is true at King's Landing, it's true of Renly Baratheon and it's true of a dead boy. It may or may not be true for Daenerys, but we don't know because she doesn't appear this week.