In the interests of readability and accessible, and due to my near-uncontrollable ADD, I have injected Head Trip with every imaginable graphical teaching device. Foremost among these are the “passport stamps,” which end every chapter, and summarize where – in the wide wide mind – the reader-voyager has just been. Each state of consciousness is like a place you can visit, a country with its own language and customs. So I ran with the metaphor. Here is one of 12 stamps. Ch-thunk, “next please.”