Bhagavad Gītā Chapter 4, Verse 38: Krishna to Arjuna — Jñāna-Karma-Sannyāsa-Yoga

Bhāṣyakāra purports

• Śaṅkaraadvaita

  Nothing in this world equals jñāna (knowledge of the Self) as a purifier — not ritual, not austerity, not any other discipline. Śaṅkara's bhāṣya insists that jñāna alone uproots saṃsāra at its root, because it destroys ajñāna (ignorance), which is the very seed of all karma and rebirth. The qualified seeker — ripened through karma-yoga and samādhi-yoga over great time — discovers this knowledge spontaneously within the antaḥkaraṇa (inner instrument), not through external conferral.

  divergence: योगसंसिद्धः योगेन कर्मयोगेन समाधियोगेन च संसिद्धः … कालेन महता आत्मनि विन्दति

• Rāmānujaviśiṣṭādvaita

  Ātma-jñāna (knowledge of the individual self as a mode of Bhagavān) is the supreme purifier because it destroys all sin at its root — no other object in this world accomplishes this. Rāmānuja's bhāṣya specifies that this jñāna arises through jñānākāra-karma-yoga: karma performed daily, in the form of knowledge, as worshipful service. Over time, the sādhaka (practitioner) attains it within the svātman (own self) by Bhagavān's grace operating through the vehicle of sustained practice.

  divergence: यथोपदेशमहरहरनुष्ठीयमानं ज्ञानाकारकर्मयोगेन संसिद्धः कालेन स्वात्मनि स्वयमेव लभते

• Madhvadvaita

  Jñāna of Hari's absolute supremacy — and the jīva's (individual soul's) eternal, irreducible dependence on Him — is the incomparable purifier. Madhva's brief gloss treats 4.38-39 together as the upasaṃhāra (conclusion) of the means and its fruit: the obstacle (opposition to Hari's soverignty) is named, and the liberative result (direct surrender) is announced. Purification is real, not illusory, because the jīva is really distinct from Brahman and really contaminated by tamas (darkness); no non-dual dissolution is implied.

  divergence: तत्साधनं विरोधिफलं च तदुत्तरैरुक्त्वोपसंहरति (Madhva treats 4.38-39 jointly — no independent 4.38 prose)

• Vallabhaśuddhādvaita

  Among tapas (austerity), dhyāna (meditation), and all other disciplines, nothing matches the purifying power of the jñāna that is the common object of both Sāṅkhya and Yoga — because this knowledge is the direct recognition of Kṛṣṇa as the one supreme reality underlying both analysis and union. Vallabha specifies that this brahma-jñāna is attained only by one whom Kṛṣṇa has anugrahed (graced) — the matta-yogi (one intoxicated by Kṛṣṇa's līlā-prasāda) receives it in time as svayam-siddha (self-accomplished) flowering within the ātman.

  divergence: मदनुगृहीतः प्राप्नोतीति स्वयमुक्तम् … साङ्ख्ययोगैकार्थरूपज्ञानेन तुल्यं पवित्रं नास्ति

• Śrīdharabhakti

  Among all the purifying practices — tapas (austerity), yoga, and the rest — none equals jñāna; this is the bhāgavata consensus Śrīdhara anchors matter-of-factly. He then pivots to the logical question his own commentary raises: if jñāna is so supreme, why don't all practitioners simply take it up directly? His answer: this ātma-viṣaya jñāna (knowledge whose object is the Self) arrives spontaneously and without strain (anāyāsena) only in one who has attained yogyatā (fitness) through karma-yoga over great time — it cannot be forced or bypassed.

  divergence: तर्हि सर्वेऽप्यात्मज्ञानमेव किं नाभ्यस्यन्तीत्यत आह … कर्मयोगेन संसिद्धो योग्यतां प्राप्तः सन् स्वयमेवानायासेन लभते

• Madhusūdanaadvaita-bhakti

  Neither in the Veda nor in ordinary worldly practice does any purifier equal jñāna, because only jñāna removes ajñāna (ignorance) at the root — destroying not merely the fruit of sin but its very seed. Madhusūdana argues with philosophical precision: other purifiers remove only the effect while the cause (ajñāna) remains, allowing sin to resurface; jñāna alone breaks the causal chain entirely. He then addresses the objection — why doesn't this jñāna arise quickly for everyone? — by specifying that the kāla (time) ripened karma-yoga-saṃskāra produces this recognition spontaneously within the antaḥkaraṇa (inner instrument), and that even a qualified aspirant cannot receive another's niṣṭhā (established orientation) as one's own.

  divergence: ज्ञानभिन्नस्याज्ञानानिवर्तकत्वेन समूलपापनिवर्तकत्वाभावात् … नतु योग्यतामापन्नोऽन्यदत्तं स्वनिष्ठतया न वा परनिष्ठं स्वीयतया विन्दतीत्यर्थः