Wow, I'm going to have to listen to this again! There are so many ideas about the physics of reality and the world in which we live and the overall concepts that most of us just take for granted without really having any idea what they mean and the consequences of them! Yes, "we have no idea…". We don't even know to ask the questions, and when the questions are asked, we don't know where we are going when we try to answer them.
This is a good and enlightening book that truly tries to make us think! And the author throws him some humor in order to keep it from being a "totally dry physics book". He tries to keep the reader entertained by the subject by trying to keep concepts real. His examples are amusing as opposed to boring, and that is part of why I don't object to the thought of rereading it.