like all of khan's writings, this book helps the reader to explore higher estates of consciousness through exercise and practice. as the title probably functions to select out individuals who are less interested in the required physical work, such states of enlightenment require practice and, preferably, observation by and objective feedback by someone who can provide such feedback. as always, this book is very well written. i would recommend it for individuals interested in exercises in sufism. i probably would be inclined to not recommend it for scholars of sufism.