In this famous guidebook for the advanced student, Dane Rudhyar, late dean of American astrologers, speaks of the crisis facing astrology today- a crisis caused by the vast growth of interest in this ancient science. 
Presenting astrology as "a system of coherent symbolism," Rudhyar uses many of the same concepts expressed in Oriental philosophy (particularly the concept of change and the concept of opposites embodied in the I Ching), along with modern psychological theories, to demonstrate how the ancient science of astrology and modern psychology complement each other in providing us with a technique for personal fulfillment.