I admire this author's ability to present multiple perspectives of the same phenomenon. I was disappointed in his heavy slam of Psychology and Psychiatry, however. First off, Psychology is not psychiatry. Secondly, there are other branches of psychology than just cognitive/behavioral. Psychiatry is the medical takeover of mental health and is based on the disease model and medication. There has been an ages old internal locking of horns since Psychiatry got its foot in the door of Psychology. Grof, who is the one who coined the term "Spiritual Emergence" is from the school of Psychology. And to broad brush Psychology (which actually started out as the "study of the soul") as being counter to spiritual work is not accurate. A personal has to do their shopping to find the right therapist and deal with their reluctant insurance companies, but that is not Psychology's error.
One of my first academic research papers was on Grof & Grof's Spiritual Emergence and Altered States which led into the branch of Spiritual Emergency (related to emergence and not necessarily the misinterpreted acute response definition of emergency, though that can be a small part of it - pop psych really too this one down a misguided hole along with Shadow Work and Inner Work, but I digress). My main area of study within Psychology and Addictionology was ecstasy and altered states. My second research paper was on the Native American Church and its use of Peyote Ritual as a treatment for alcoholism. Data supports the idea that it is more to do with how one uses substances and not so much the chemical part of the equation that makes the difference. It all works together - mind, body, soul, and Spirit.
Anyway, so many will mishmash all of these separate schools of thought together into an pop culture version without paying too much credence to the different perspectives which creates a hodgepodge mush of amazing information. Rendering it inert eventually.
Jules Evans is amazing with his philosophical interpretations, though. Enjoy....