Mbh 13.6.3a

"'"Brahma said, 'Nothing comes into existence without seed. Without seed, fruits do not grow. From seeds spring other seeds. Hence are fruits known to be generated from seeds. Good or bad as the seed is that the husbandman soweth in his field, good or bad are the fruits that he reaps. As, unsown with seed, the soil, though tilled, becomes fruitless, so, without individual Exertion, Destiny is of no avail. One's own acts are like the soil, and Destiny (or the sum of one's acts in previous births) is compared to the seed. From the union of the soil and the seed doth the harvest grow. It is observed every day in the world that the doer reaps the fruit of his good and evil deeds; that happiness results from good deeds, and pain from evil ones; that acts, when done, always fructify; and that, if not done, no fruit arises. A man of (good) acts acquires merits with good fortune, while an idler falls away from his estate, and reaps evil like the infusion of alkaline matter injected into a wound. By devoted application, one acquires beauty, fortune, and riches of various kinds. Everything can be secured by Exertion: but nothing can be gained through Destiny alone, by a man that is wanting in personal Exertion. Even so does one attain to heaven, and all the objects of enjoyment, as also the fulfilment of one's heart's desires by well-directed individual Exertion. All the luminous bodies in the firmament, all the deities, the Nagas, and the Rakshasas, as also the Sun and the Moon and the Winds, have attained to their high status by evolution from man's status, through dint of their own action. Riches, friends, prosperity descending from generation to generation, as also the graces of life, are difficult of attainment by those that are wanting in Exertion. The Brahmana attains to prosperity by holy living, the Kshatriya by prowess, the Vaisya by manly exertion, and the Sudra by service.