Ayurveda defines health holistically as a state of equilibrium of the body's systems and a blissful state of the soul, senses and mind. This includes physical, mental and spiritual well-being. Some key aspects of health according to Ayurveda include proper digestion, metabolism, and elimination; strong tissues; and a balanced mind. Disease results from derangement of these systems due to improper diet, lifestyle, intellectual errors or changes over time. Ayurveda emphasizes lifestyle factors like diet, sleep, celibacy and daily/seasonal routines to support health and prevent disease.