Shloka 25
Śānti-parva 206: Guṇa-hetu Moha, Kāma-krodha Chain, Indriya-utpatti, and Nirodha
ज्ञानेन निर्मलीकृत्य बुद्धि बुद्धथा मनस्तथा । मनसा चेन्द्रियग्राममक्षरं प्रतिपद्यते
jñānena nirmalīkṛtya buddhiṁ buddhyā manas tathā | manasā cendriyagrāmam akṣaraṁ pratipadyate ||
毗湿摩说：以真实之智（jñāna）净化辨识之慧（buddhi），复以澄明之慧安住其心（manas）；由心统摄诸根（indriya）之群，使之归于节制。如此内在自制，便证得“不坏者”（Akṣara）——不变的梵（Brahman）。
भीष्म उवाच
Educational Q&A
A graded inner discipline: knowledge purifies the intellect; the purified intellect steadies the mind; the steadied mind governs the senses; through this self-mastery one realizes the Imperishable (akṣara), i.e., the highest unchanging reality.
In Shanti Parva, Bhishma instructs Yudhishthira on dharma and the path to peace after the war. Here he explains an inward yogic-ethical process—purification of intellect and mind leading to restraint of the senses and realization of the supreme.