QUOTE : Arjuna, way back, Brahma created humans through yagna and declared that yagna will satisfy all human needs. Use yagna to satisfy the other and the other will satisfy you. If you take without giving, you are a thief. Those who feed others and eat leftovers are free of all misery. Those who cook for themselves are always unhappy. Humans need food. Food needs rain. Rain needs exchange. Exchange needs action. Exchange began with divinity, that primal spark of humanity. Those who indulge themselves, those who do not repay it backwards, as well as pay it forward, break the chain, are miserable and spread misery.—Bhagavad Gita: Chapter 3, verses 10 to 16 (paraphrased).