Bhagavad Gītā Chapter 18, Verse 48: Krishna to Arjuna — Mokṣa-Sannyāsa-Yoga
Don't abandon the work born of your own nature, Arjuna, even when it carries fault, for every undertaking is touched by defect as fire is wrapped in smoke.
Bhāṣyakāra purports
- Śaṅkaraadvaita
The sahaja-karma (birth-inherent action) should not be abandoned even when marked by the taint of trigunatmaka (three-guna constitution), O Kaunteya — for the ajnani (non-knower of the Self) cannot entirely cease from action; and abandoning svadharma (one's own duty) for paradharma brings no freedom from the same defect. All undertakings, svadharma and paradharma alike, are necessarily veiled by the dosa (defect) native to trigunatmaka existence, as fire is always accompanied by its born companion smoke. The tarka (dialectical point) stands: since total abandonment of karma is impossible for one who has not yet attained atma-jnana (self-knowledge), the only viable path is svadharma performed without grasping — which alone purifies the antahkarana (inner organ) as preparation for jnana.
divergence: Shankara: 'sahajanm eva utpannam... trigunnatmakatvat dosena dhumena sahajjena agnir iva avritah' — the adjective sahaja (born-with) signals that the defect is constitutional, not correctable by change of action-type; the smoke is 'sahaja' to the fire, not adventitious.
- Rāmānujaviśiṣṭādvaita
The karma that arises from one's own svabhava (natural constitution) is sukara (easy to perform) and apramada (free from negligence) precisely because it is sahaja — and it should not be abandoned even when colored by suffering (saduhkha), for this ease and attentiveness are its advantage over jnana-yoga. Both karma-arambhas (initiations of action) and jnana-arambhas (initiations of knowledge) are veiled by dosa — that is, by duhkha (suffering) — as fire by smoke; but karma-yoga's distinctive excellence is that it is the easier and more reliable path for one who seeks Bhagavan. Even one eligible for jnana-yoga is directed to perform karma-yoga, since the fruit of loka-sangraha (world-sustaining action as worship) is fully secured.
divergence: Ramanuja: 'sukaram apramadam ca karma... jnanayogah tadvipariitah' — the crucial distinction is practical reliability: karma-yoga is tractable where jnana-yoga is not; the dosa (duhkha) afflicts both equally, so the easier instrument is preferred.
- Madhvadvaita
*Sahaja-karma* (action born of one's own nature) must not be abandoned, *kaunteya*, even when marked by *doṣa* (defect) — for all *ārambhāḥ* (undertakings) are covered by defect as fire is covered by smoke: *sarvārambhā hi doṣeṇa dhūmenāgnirivāvṛtāḥ*. The *jīva*, *paratantra* (eternally dependent) on *svatantra* Hari, does not choose its *svabhāva*; that nature is assigned by Hari in strict accordance with *taratamya* (graded ontological hierarchy). To abandon the *karma* native to that assigned nature is to rupture the ontological subordination — *śeṣa-vṛtti* (the mode of being-the-remainder, the servant-relation) — that defines the *jīva*'s real standing before Hari. *Pañca-bheda* (the five-fold real distinction) remains intact: Lord and *jīva* are never collapsed, and the *jīva*'s defect-tinged action, offered without fruit-desire to Hari, does not dissolve the *bheda* (real distinction) but discharges the *jīva*'s station within it. Just as smoke does not negate fire's nature as fire, *doṣa* does not negate the binding reality of *sahaja-karma* nor the *jīva*'s obligation to fulfill it.
divergence: Both Madhva and Jayatīrtha are silent on this verse. The reading is voiced directly from dvaita *siddhānta*: *paratantra* *jīva*, *taratamya*, *pañca-bheda*, and *śeṣa-vṛtti* as the doctrinal coordinates that determine how *sahaja-karma* and its inherent *doṣa* are to be understood.
- Vallabhaśuddhādvaita
Bhagavan Himself has created each varna's sahaja-karma along with the varna at creation itself — 'mukhabahurrupadadebhyah purusasyashramah saha' (Bhagavata 11.5.2) — so renouncing it would be renouncing His lila-prasada (gift of divine play). Even if the Sankhya perspective discerns himsa-dosa (the defect of violence) in svadharma and judges another's dharma superior, that paradharma carries the same defect: no human karma is smoke-free. Further, 'dosa' here may also mean 'duhkha' (suffering) — and all action, including jnana, begins veiled by effort and pain, as fire is first veiled by smoke, but ends in illumination: the analogy promises that svadharma, however smoky at the outset, culminates in the pure light of Krsna-seva.
divergence: Vallabha: 'doshapadam duhkhavacanam... ante prakasha eva' — he reads the fire-smoke simile as temporal: smoke at beginning, light at end; the duhkha of sahaja-karma is transitional, not its final nature.
- Śrīdharabhakti
One who contemplates abandoning svabhava-vihita (nature-ordained) karma because it contains himsa-dosa should understand: all karma, svadharma and paradharma alike, is pervaded by some defect — none is smokeless. As fire is veiled by its inherent smoke yet is still sought for warmth and dispelling of darkness, so karma must be engaged with: its dosa-amsha (defect-portion) is acknowledged and set aside, while its guna-amsha (virtue-portion) is employed for sattva-shuddhi (purification of being). The right relationship to action is not purity-through-abandonment but discrimination within engagement — taking the fire's heat while accepting the smoke as unavoidable companion.
divergence: Sridhara: 'yathaagnerdhumam dosham apakritya pratapa eva tamahshitadi nivrittaye sevyate tatha karmanopi doshamsham vihaya gunamsham eva sattvashuddaye sevyata' — the simile functions as practical instruction: separate heat from smoke in use, not in principle.
- Madhusūdanaadvaita-bhakti
The unenlightened one who identifies with varna and ashrama — not yet having attained antahkarana-shuddhi (inner-organ purification) — cannot remain even a moment without acting; nor does abandoning svadharma for paradharma free him from dosa. Therefore, like the creature that lives in poison and cannot abandon it, the ajnana-adhikarin (one whose adhikara is still pre-jnana) must continue in sahaja-karma — jyotishtoma, yuddha, and its kind — even with its trigunatmaka dosa and the specific dosa of bandhu-vadha (slaying of kinsmen). Those who have achieved shuddhantahkarana (purified inner instrument) may indeed renounce; for all others, nivritti is unavailable — their path through the smoke is the only path to the fire's eventual clarity.
divergence: Madhusudana: 'ajno varnnashramabhimani... sahajanam karma yugdhadi trigunnatmakatvena... sadoshamapi na tyajet... shuddhantahkaranastU tyajed eva' — the key move: two populations, one rule for each; the verse addresses only the first.