Dancing with Yin and Yang: Ancient Wisdom, Modern Psychotherapy and Randolph Stone's Polarity Therapy. This new approach to mental wellness shows how the universal principles of nature, known as Yin and Yang in the wisdom traditions, can be applied to psychology. General principles and specific applications are provided, including a fresh view of Fritz Perls' famous two-chair Gestalt method and a concise illustrated summary of Stephen Porges' Polyvagal Theory.