KofR is part I of a trilogy. The Phs is number II and WofM number III. One can start from it after reading general instructions os study. 1.1.-1.41 is the basis. it must be read 20 times. Modern European philosophy is only 71 pages. It is all one needs. Yoga is essentially different from esoteric. I hav estudied the book for 27 years. Always something new.