Arroyo examines astrology through scientific, philosophical, and intuitive lenses. He advocates for astrology as a diagnostic tool in counseling, drawing parallels between astrological archetypes and universal psychological principles.
Arroyo heavily draws from Humanistic Psychology and the works of Dane Rudhyar to show how astrology can be used as a practical diagnostic tool in the counseling arts. The Four Elements: The Building Blocks of Personality
The book's clarity and innovative approach were immediately recognized. The praised it, stating, "Transcending the boundaries of separate disciplines, this work represents a major distillation of astrological principles". This recognition, along with its award from the British Astrological Association, helped cement its status as a "pioneering book" that established a "new science of astrological psychology".
