Alan Watts has a unique way of explaining the unexplainable, this book contains some mind stretching but thought provoking ideas. Our differences point to our one-ness, outside and inside are the same (just look at a Klein bottle), you can't have up without down so they must be one. This book, like many others will make you think beyond your current thoughts and if you're lucky you might stop (but why would you want to?).
It's quite funny how we try to voice our opinion about everything and anything. This book tells us not to. Theses opinions, thoughts join the ocean of energy which is life. I listen to Allan on YouTube quite often. It's afore of meditation for me. So was this book.