Being a monk was the strangest and most perverted way of life imaginable. Monks spent half their lives putting themselves through pain and discomfort that they could easily avoid, and the other half muttering meaningless mumbo jumbo in empty churches at all hours of the day and night.
The revelation of these ancient secrets made him feel as if he had been living with one eye closed.
Note: "living with one eye closed." What a wonderful turn of phrase.