Natural Balance- Bhagvad Gita

If one affects the natural balance and harmony present in his body and sleeps or eats excessively, he will fail to preserve the equilibrium of the metabolic functions. Therefore, he will get sick and the cure to re-establish the balances in his organism is to be found in practicing yoga: "He who is temperate in his habits of eating, sleeping, working and recreation can mitigate all material pains by practicing the yoga system." (Bhagavad-gita 6.17)