Ayurveda greatly influenced health care practices in the east and the west. By 400 AD Ayurvedic works were translated into Chinese; by 700 AD Chinese scholars were studying medicine in India at Nalanda University. Chinese medicine, herbology, and Buddhist philosophy were also impacted by Ayurvedic knowledge. Having passed the test of experience it remains essentially the same now as at its inception, although numerous commentators over the centuries have added insight with their analyses. The philosophy of Ayurveda teaches a series of conceptual systems characterized by balance and disorder, health and disease. Disease/health results from the interconnectedness between the self, personality, and everything that occurs in the mental, emotional, and spiritual being. To be healthy, harmony must exist between the purpose of healing, thoughts, feelings and physical action. Ayurveda is a careful integration of six important Indian philosophical systems, many physical/behavioral sciences, and the medical arts. One verse from an ancient authority says Ayurveda deals with what is a good life and a bad life, happiness and misery, that which supports or destroys, and the measurement of life.