I had read Aldous Huxley's 'Doors of Perception' when I was working on 'How to Change Your Mind' and before I had used a psychedelic. It's a wonderful essay. I encourage everybody to look at it. It's the first trip report, really. And it's influenced everybody's trip since then. You may not have read this book, but what you saw and happened to you on psychedelics, he wrote in part.