Bhagavad Gītā Chapter 2, Verse 25: Krishna to Arjuna — Sāṅkhya-Yoga
This self is unmanifest, unthinkable, and immutable, so knowing it as such, you have no cause to grieve.
Bhāṣyakāra purports
- Śaṅkaraadvaita
This ātmā is called avyakta (unmanifest) because it falls outside the range of every instrument of perception (sarva-karaṇa-aviṣayatva); and precisely because it is not sensory-accessible, it is called acintya (unthinkable) — for whatever enters the field of the sense-organs becomes an object of cognition, but this ātmā, being non-sensory, does not. It is therefore avikārya (immutable), for change requires parts, and milk can curdle only because it is composite; the partless (niravayava) admits no modification whatsoever. Having grasped the ātmā as avyakta, acintya, and avikārya in precisely this manner, you should not grieve with the thought 'I have slain them' or 'they are slain by me.'
- Rāmānujaviśiṣṭādvaita
The pramāṇas (instruments of knowledge) that reveal chedya (cuttable) things cannot reveal this ātmā at all — it is therefore avyakta (unmanifest), wholly heterogeneous to those entities (tad-vijātīya), a being unlike any object that any known pramāṇa was designed to reach. Because it is other-in-nature (sarva-vastu-vijātīya) to every category of thing, it cannot even be mentally pictured — it is acintya (unthinkable) not as a defect but as the signature of its transcendence of all classes of existing things. It is therefore avikārya (not liable to modification), and knowing this ātmā of such described character, you, Arjuna, ought not to grieve on its account.
- Madhvadvaita
Precisely because of what has been established in the preceding verses — the ātmā's immunity to cutting, burning, wetting, and drying — it follows necessarily that this ātmā is 'of the form of avyakta (unmanifest) and so on.' The four-fold immunity is not incidental; it is the logical ground (ata eva) from which the triple characterization avyakta-acintya-avikārya flows as a consequence. Note: Madhva's commentary here is one clause; further elaboration would exceed the text's own economy.
- Vallabhaśuddhādvaita
When the verse says avyakta (unmanifest) and acintya (unthinkable), it speaks of the akṣara (imperishable) ātmā — and the criterion of acintya is precisely that it is beyond Prakṛti, as the scriptural maxim confirms: 'prakṛtibhyaḥ paraṃ yat tat acintyasya lakṣaṇam' (that which is beyond the Prakṛtis, that is the mark of the unthinkable). An objection might arise: is not the avyakta (unmanifest) Pradhāna (primal matter) well known as precisely such? The verse forestalls that confusion with avikārya (immutable) — since Pradhāna is by nature vikārya (subject to modification), the avikārya ātmā cannot be identified with it. Know this ātmā as Kṛṣṇa's own self-gift, untouched by the world's flux, and grief dissolves.
- Śrīdharabhakti
Śrīdhara maps the three epithets to three levels of the human cognitive apparatus: avyakta (unmanifest) means the ātmā is beyond the range of cakṣus and the other sense-organs (cakṣur-ādy-aviṣaya); acintya (unthinkable) means it is beyond manas (the mind) as well; and avikārya (immutable) means it is beyond the karma-indriyas (action-organs) — nothing we sense, think, or do can touch or alter it. The verb ucyate ('it is said to be') is not mere convention: it validates the testimony of the realized (abhiyukta-ukti), which is itself a pramāṇa (instrument of valid knowledge). Having established this, the verse draws its logical conclusion: therefore grieve not.
- Madhusūdanaadvaita-bhakti
Madhusūdana conducts a systematic elimination of all pramāṇas (valid cognitions) that could support the attribution of chedyatva (cuttability) and related properties to the ātmā: pratyakṣa (perception) fails because the ātmā lacks rūpa and the other sense-qualities, hence it is avyakta (unmanifest) — nothing directly perceptible can bear witness to its cuttability; anumāna (inference) also fails because inference requires a liṅga (inferential mark) grasped in prior perception, and no such mark has ever been perceived in the ātmā — hence it is acintya (beyond inference); arthāpatti (postulation) and sāmānyato-dṛṣṭa (inference from general resemblance) also fail because both require vikriyā (modification) in the subject, and the ātmā is avikārya (immutable, not subject to modification); even the word of the Veda (ucyate) confirms it as accheda-avyakta, and therefore the Veda itself cannot be enlisted to establish chedyatva. The apparent repetition across BG 2.17–2.25 is deliberate — Bhagavān Vāsudeva returns to the same substance through fresh formulations precisely because the ātmā is durbodha (difficult to comprehend) for those enmeshed in saṃsāra, and each fresh angle dismantles another layer of māyā-born assumption.