This chapter introduces the essential teachings of Nalanda University, which integrated and transmitted the full legacy of all the Buddhist traditions throughout ancient India, including those of the Individual Vehicle or Theravada, the Universal Vehicle or Mahayana, and the Esoteric Vehicle or Tantrayana. That means distilling the oceanic intellectual and scriptural legacy contained within the entire gradual curriculum and all three great libraries of Nalanda such as Ratnagiri, a legacy shared with many other great Indian Buddhist universities of the first millennium. Tibetan doctors and psychologists are concerned that our worldview is too reductive, too materialistic. Traditionally, when a person aspires to become a Tibetan doctor or healer, not only does she work very hard to cultivate the altruistic spirit of universal love and compassion, but she would also imaginatively and ritually enter into the sacred circle or visionary world of the Medicine Buddha.