Mbh 12.296.1b

It is well-known, however, that true felicity is theirs that are endued with intelligence, that are utterers of the eternal Brahma, that seek to accomplish only acts that are auspicious and beneficial, and that abstain from all acts that are optional and spring from desire alone.[1532] From loss of all such objects in which are centred our affections, from loss of wealth, O king, and from the tyranny of physical diseases add mental anguish, a person falls into despair. From this despair arises an awakening of the soul. From such awakening proceeds study of the Scriptures. From contemplation of the import of the scriptures, O king, one sees the value of penance. A person possessed of the knowledge of what is essential and what accidental, O king, is very rare,--he, that is, who seeks to undergo penances, impressed with the truth that the happiness one derives from the possession of such agreeable objects as spouses and children leads ultimately to misery.[1533] Penances, O child, are for all. They are ordained for even the lowest order of men (viz., Sudras). Penances set the self-restrained man having the mastery over all his senses on the way to heaven. It was through penances that the puissant Lord of all creatures, O, king, observing vows at particular intervals created all existent objects. The Adityas, the Vasus, the Rudras, Agni, the Aswins, the Maruts, the Viswedevas, the Saddhyas, the Pitris, the Maruts, the Yakshas, the Rakshasas, the Gandharvas, the Siddhas and the other denizens of heaven, and, indeed, all other celestials whatever, O child, have all been crowned with success through their penances. Those Brahmanas whom Brahmana created at the outset, succeeded through their penances in honouring not the Earth alone but the heaven also in which they roved at pleasure. In this world of mortals, they that are kings, and those others that are householders born in high families, have all become what they are only in consequence of their penances.