The key concept of pg's essay is the prepared mind. It is a variant of the very old idea that we cannot see that we don't know. This is called blindness of ign

The key concept of pg's essay is the prepared mind. It is a variant of the very old idea that we cannot see that we don't know. This is called blindness of ignorance. The rest is a list of examples of what could be seen and have been seen by others and some hints to how to train your mind. What could be seen does not matter. What matter is how to gain the ability to see, which means to overcome ignorance. It is quite possible that pg himself saw it as a meta-model, or it was just an insight of the one, who already made his way to "enlightenment".) btw, being familiar with Pirsig's book in ones twenties is a very telling factor.)