Bhagavad Gītā Chapter 8, Verse 21: Krishna to Arjuna — Akṣara-Brahma-Yoga

Bhāṣyakāra purports

• Śaṅkaraadvaita

  That which is designated 'avyakta' (unmanifest) and 'akṣara' (imperishable) — these are names for the same unsurpassable state. Reaching that state, one does not return to saṃsāra (cyclic existence). That dhāma (abode) is the supreme pada (station) of Viṣṇu — which Śaṅkara reads as Brahman itself, beyond the reach of any further predication.

  divergence: Śaṅkara glosses 'dhāma' as sthāna and equates it with Viṣṇu's paramaṃ padam — not a personal Vaikuṇṭha but the signless Brahman-station that the akṣara-designation points toward.

• Rāmānujaviśiṣṭādvaita

  The 'avyakta akṣara' is the ātman (self) stripped of its entanglement with acit-prakṛti (insentient nature) — the jīva's own liberated svarūpa (essential form). Arriving there, the liberated soul reaches the Lord's paramaṃ niyamasthānam (supreme ground of governance) — the third mode of Brahman's sovereign ordering, beyond both acit-prakṛti and mixed jīva-prakṛti. The dhāma-word equally carries the sense of aparicchinnam jñānam (unbounded cognition) — the mukta's expanded knowing that is itself Brahman's own light.

  divergence: Rāmānuja explicitly distinguishes three niyama-sthānas: acit alone, jīva-entangled, and liberated-svarūpa; the third is this dhāma. He offers a second reading: dhāma as prakāśa/jñāna — the mukta's uncontracted awareness.

• Madhvadvaita

  The avyakta is Bhagavān Viṣṇu himself — not a state or principle but the Person who was named in 8.15 as 'māmupetya.' The dhāma is Viṣṇu's own svarūpa and tejas (luminous self-nature), as the Gāruḍa-Purāṇa confirms: tejassvarūpaṃ gṛhaṃ dhāmeti gīyate. Reaching him, the jīva does not return — because the jīva is eternally, ontologically other than Hari, and final union is loving proximity, not identity.

  divergence: Madhva's commentary runs 8.20–8.21 as a single movement, anaphoring back to 8.15 māmupetya; dhāma is established via Gāruḍa-citation as luminous divine abode, not abstract locus.

• Vallabhaśuddhādvaita

  This avyakta akṣara is neither jīva nor prakṛti — for neither could be the destination from which none return, since both jīva and prakṛti would then be nitya-mukta (eternally free), making śāstra and sādhana pointless. It is Puruṣottama's own adhiṣṭhāna (foundation-ground), Vaikuṇṭha — the eternal, luminous, ananta-rūpa (infinite-formed) abode described as satyaṃ jñānamanantaṃ. The jñāna-mārgī attains this by sādhana, but Vallabha marks himself apart: this dhāma is also accessible by ahaitukaī bhakti (uncaused grace-devotion), which does not require the instrumental path.

  divergence: Vallabha refutes three possible referents (jīva, prakṛti, and abstract Brahman) before landing on Puruṣottama's Vaikuṇṭha; he closes with the contrast between sasādhana-jñāna-labhya and ahaitukaī-bhakti-labhya — himself implicitly in the second.

• Śrīdharabhakti

  Śrīdhara cites śruti directly — 'puruṣān na paraṃ kiṃcit, sā kāṣṭhā sā parā gatiḥ' — to establish that the avyakta akṣara is the supreme puruṣārtha (human end). The phrase 'yam prāpya na nivartante' is itself the proof of its finality. The 'mama dhāma' employs a genitive of relation (ṣaṣṭhī) as in 'rāhoḥ śiraḥ' — Rāhu does not possess a head as property; the head simply is Rāhu. So Kṛṣṇa's dhāma simply is Kṛṣṇa — 'ahaṃ eva paramā gatiḥ.'

  divergence: Śrīdhara's key move is the rāhoḥ-śiraḥ grammatical analogy to explain 'mama dhāma' as identity-genitive, collapsing the dhāma back into Kṛṣṇa himself. This is a clean bhāṣya anchor with no HTML artifact.

• Madhusūdanaadvaita-bhakti

  The bhāva designated avyakta and akṣara here and across śruti and smṛti is the destination of paramānanda-svarūpa (self-luminous supreme-bliss nature), where birth-and-death have no foothold. Madhusūdana, following Śaṅkara's rāhoḥ-śiraḥ analogy verbatim, says 'mama dhāma' is a bheda-kalpanā genitive — difference is posited only grammatically; the meaning is 'I alone am the supreme goal.' Yet his voice carries Kṛṣṇa as the beloved: the supreme abode is not a cold absolute but utpatti-vināśa-śūnya svaprakāśa paramānanda — the Beloved's own self-luminous bliss.

  divergence: Madhusūdana cites the same śruti as Śrīdhara and uses the identical rāhoḥ-śiraḥ gloss — but his description of the dhāma as svaprakāśa-paramānanda inflects the Advaita frame with Kṛṣṇa-rasa.