Coward shows how the yogic notion of psychological processes makes Bhartrhari's philosophy of language and his theology of revelation possible. He goes on to explore how Western psychology has been influenced by incorporating or rejecting Patañjali's Yoga. The implications of these trends in Western thought for mysticism and memory are examined as well. This analysis results in a notable insight, namely, that there is a crucial difference between Eastern and Western thought with regard to how limited or perfectible human nature is-the West maintaining that we as humans are psychologically, philosophically, and spiritually limited or flawed in nature and thus not perfectible, while Patañjali's Yoga and Eastern thought generally maintain the opposite. Different Western responses to the Eastern position are noted, from complete rejection by Freud, Jung, and Hick, to varying degrees of acceptance by transpersonal thinkers.