We exist in a dualistic universe. Just as you cannot have a “back” without a “front”, every experience you go through in life can be looked at in a similar way. It’s all the same, yin and yang. Watts explains that he can be a deeply spiritual man but still enjoy and love the indulgences of sexuality, drink and LSD. He makes no distinction or line between the two. They are one as he is one. It is all the same.
The one key takeaway I took was the concept of yin & yang. In this society we are conditioned to a very binary way of thinking. “This is bad”, “this is good” and so on. I learned from Alan Watts that the world deals with the polarity as one. Yin = darkness, sadness, suffer, cannot exist without the Yang = light, happiness, joy.