Western medicine, in contrast, heavily delineates between mind and body, between doctor and patient and between healthy and diseased. Based on this philosophy of reductionism and mainly guided by science in which truth is derived from observation and empirically correct interpretation, faith – that which cannot be proven through scientific method – is seen as of lesser value (than knowledge gained by direct experience). While health is defined in the East as a unity of individual, environmental and societal factors, western definition of health though having recently moved towards encompassing physical, mental, social and spiritual arenas, still represents it as a separate entity and theories of pathology still drive mechanism perceptions of health disorders. While eastern healing traditions view illness to be caused by imbalances of patterns that should be in harmony, illness in modern western medicine is described by specific pathology caused by discrete foreign pollutants and often cured by another foreign element. Ayurveda was the first medical system to recognize the concept of individual mind-body types and the importance of the mind-body connection. The ancient Vedic culture in India took this concept of constitutional medicine to its highest development in the form of Ayurvedic medicine.