Nārāyaṇa-tejas: Kṛṣṇa’s Vrata, the Fire-Manifestation, and the Sages’ Inquiry (अनुशासन पर्व, अध्याय १२६)
तपसा महदाप्रोति विद्यया चेति न: श्रुतम् । तपसैव चापनुदेद् यच्चान्यदपि दुष्कृतम्
bhīṣma uvāca | tapasā mahad āpnoti vidyayā ceti naḥ śrutam | tapasaiva cāpanuded yac cānyad api duṣkṛtam |
तपसा महदाप्नोति विद्यया चेति नः श्रुतम् । तपसैव चापनुदेद् यच्चान्यदपि दुष्कृतम् ॥
भीष्म उवाच
Bhishma teaches that both disciplined austerity (tapas) and learning (vidyā) lead to exalted attainment, and that tapas has a purificatory power capable of removing the stains of wrongdoing.
In the Anushasana Parva’s instruction on dharma, Bhishma continues advising Yudhishthira by citing traditional teaching: spiritual discipline and knowledge elevate a person, and austerity functions as a means of moral purification.