No boundary was written by one of my favorite philosopher Ken Wilber, it is an amazing book to understand different levels of human consciousness. I made a concept map to capture the core ideas of chapter 7 8 9 in this book.
Here is the spectrum of consciousness proposed by Wilber in this book. It is interesting to think about how we see ourselves and human beings from different levels, and what could be changed as we move from the top level to the bottom level (from narrower to wider spectrum, as shown in this figure)
Wilber, K. (2001). No boundary: Eastern and Western approaches to personal growth. Shambhala Publications.