Bhagavad Gītā Chapter 4, Verse 39: Krishna to Arjuna — Jñāna-Karma-Sannyāsa-Yoga

Bhāṣyakāra purports

• Śaṅkaraadvaita

  Only the one whose intellect holds firm in śraddhā (faith-as-epistemic-trust) toward the guru's teaching, who is tat-paraḥ (wholly intent on that alone) in the means of knowledge such as guru-upāsana, and whose senses are drawn back from objects — that one obtains jñāna without fail; outer acts like prostration are contingent and may even mask deceit. Jñāna, once born, destroys avidyā instantly, as a lamp dispels darkness the moment it is lit, needing no further auxiliary. Thus the paramā śānti — liberation named mokṣa — is attained without delay: this is the settled verdict of all śāstra.

• Rāmānujaviśiṣṭādvaita

  Having received upadeśa (instruction), the sādhaka who is śraddhāvān (possessed of śraddhā toward the teaching thus imparted) and tat-paraḥ — whose mind is disciplined exclusively to that object — and who keeps the senses restrained from all else, in time reaches the ripened, mature form of that instructed knowledge. Securing such matured jñāna, the seeker swiftly attains paraṃ nirvāṇam — the supreme peace that is union with Bhagavān, which is the consummation of kainkarya (service-love). The sequential grammar of upadeśa → śraddhā → indriya-saṃyama → jñāna-vipāka signals that devotion and discipline are the soil in which the Lord's grace flowers.

• Madhvadvaita

  *Śraddhā* (faith) here is not an autonomous human faculty but *anugraha-pūrva* — consequent upon Hari's own grace, which initiates the seeker's movement toward *jñāna*. The one who is *śraddhāvān*, *tat-paraḥ* (wholly intent on That — on *svatantra* Hari alone), and *saṃyatendriya* (with restrained senses) attains *jñāna*. That *jñāna* is not self-sufficient illumination of an undifferentiated *ātman* but the *paratantra* *jīva*'s dependent recognition of Hari as the sole independently real — the one *bheda* (real distinction) between Lord and *jīva* held firm even in liberation. *Śraddhā*, *tat-parāyaṇa* (one-pointed orientation toward Him), and *saṃyama* (restraint) are the inner *sādhana* (*antaḥkaraṇa-sādhana*); *ajñāna* and its residues are the opposing forces (*virodhī*) that *saṃyama* subdues. Having obtained this *jñāna*, the *jīva* reaches *parā śānti* — the supreme peace — *acireṇa*, swiftly. That peace is not dissolution into an undivided absolute but the liberated *jīva*'s eternal *āśrita-cit* (dependent consciousness) resting in Hari, distinct within *taratamya* (the graded hierarchy of dependent beings), in unbroken *bhakti* as ontological subordination to the *svatantra* Lord.

• Vallabhaśuddhādvaita

  Vallabha focuses the verse through the guru's lens: before transmitting such supreme knowledge, a guru must test whether the śiṣya (disciple) possesses śraddhā — and it is śraddhā alone that is the qualifying criterion. The śānti the verse promises is citta-upaśama — the stilling of the mind — which in Puṣṭi-mārga is not the cold quietude of a jñānī but the sweetness of a heart resting entirely in Kṛṣṇa's prasāda (grace-gift). Where other schools read a three-part formula (śraddhā + tat-paraḥ + indriya-saṃyama), Vallabha spotlights śraddhā as the precondition that makes the other two possible, because in svarūpa-jñāna the disciple's receptivity is itself Kṛṣṇa's own śakti acting through him. NOTE: bhāṣya is terse; voice is anchored in the gloss but extended through Puṣṭi-mārga siddhānta.

• Śrīdharabhakti

  Śrīdhara reads the triad with precision: śraddhāvān is the one who holds āstikya-buddhi (the conviction of genuine trust) in the meaning as taught by the guru; tat-paraḥ is the one with ekaniṣṭhā (single-pointed commitment) to that alone; saṃyatendriya completes the triple qualification. Before jñāna is obtained, karma-yoga must be practiced for śuddhi (purification); after jñāna is obtained nothing further remains to be done — karma drops away entirely. The result is mokṣa, called paraṃ śāntiṃ, reached acireṇa (without delay) — Śrīdhara's balanced voice holds the philological rigour of a grammarian and the warmth of a devotee without collapsing either.

• Madhusūdanaadvaita-bhakti

  Madhusūdana argues that the three qualifications — śraddhā as pramā-rūpa āstikyabuddhi in guru and Vedānta-vākya, tat-paraḥ as total absorption in upāya (the means, i.e., guru-upāsana), and saṃyata-indriya as withdrawal from viṣayas — together constitute a more proximate and certain path than external rituals like praṇipāta, which are outward (bāhya) and can be mimicked. Once jñāna arises it destroys ajñāna by its mere arising, just as a lamp destroys darkness the instant it is born — no additional operation, no prasaṃkhyāna (repeated contemplation), is required. The paramā śānti is thus mukti — the cessation of avidyā and its effects — reached without any interval, in a synthesis that insists the devotional disposition of śraddhā and the Advaita flash of jñāna are not two moments but one.