The Īśāvāsya Upaniṣad (ईशावास्योपनिषद्) holds a unique position in the Vedic canon. It is one of the shortest of the principal Upanishads — just eighteen verses — and the only Upanishad that forms part of the Samhita layer of the Veda rather than being attached to a Brahmana or Aranyaka. It appears as the fortieth and final chapter (adhyāya) of the Vājasaneyi Saṃhitā of the Shukla Yajurveda. For this reason it is sometimes called the Vājasaneyi Saṃhitā Upaniṣad.
The Name
The Upanishad takes its name from its opening word, īśāvāsyam. The fuller phrase īśā vāsyam idaṃ sarvam — "all this is pervaded by the Lord" — is one of the most celebrated single statements in Vedic literature. It supplies a theistic framing for what follows: the Upanishad's metaphysics is not impersonal but pervaded by Īśa, the Lord.
Opening Verse
ईशा वास्यमिदं सर्वं यत्किञ्च जगत्यां जगत् । तेन त्यक्तेन भुञ्जीथा मा गृधः कस्यस्विद्धनम् ॥
īśā vāsyam idaṃ sarvaṃ yat kiñca jagatyāṃ jagat
tena tyaktena bhuñjīthā mā gṛdhaḥ kasyasvid dhanam
"All this — whatever moves in this moving world — is pervaded by the Lord. By that renunciation enjoy; do not covet the wealth of any."
The first verse is itself a complete philosophy. The world is divine; therefore it is not to be possessed but to be enjoyed in a spirit of tyāga (renunciation). The famous half-line mā gṛdhaḥ kasyasvid dhanam — "do not covet anyone's wealth" — has been quoted by Gandhi as the seed-mantra of his entire ethics.
Major Themes
Despite its brevity the Isha addresses the central concerns of Vedanta in remarkably condensed form.
- Action and renunciation reconciled. Verse 2 enjoins the performance of works for a hundred years — but with the awareness of the One. The Upanishad rejects the false opposition between active life and contemplative withdrawal.
- Knowledge and ignorance, action and inaction. Verses 9–11 employ a striking dialectic: those who pursue ignorance (avidyā) enter blind darkness, but those who pursue only knowledge (vidyā) enter still greater darkness; the wise reach immortality only by knowing both together. The same paradox is repeated for becoming (sambhūti) and non-becoming (asambhūti).
- The Self that is everywhere. Verses 4–8 describe the ātman as moving and unmoving, far and near, within all and without all — a poetic compression of what later Vedantins will systematize as brahman-ātman identity.
A Famous Mahāvākya Approximate
Although the Isha does not contain one of the classical four mahāvākyas, it includes a verse that functions in much the same way:
यस्तु सर्वाणि भूतान्यात्मन्येवानुपश्यति । सर्वभूतेषु चात्मानं ततो न विजुगुप्सते ॥
yas tu sarvāṇi bhūtāny ātmany evānupaśyati
sarvabhūteṣu cātmānaṃ tato na vijugupsate
"One who sees all beings within the Self, and the Self in all beings — that one has no aversion thereafter." (Isha 6)
This verse is the textual root of the Vedantic teaching that liberation is non-othering perception, and it is recited in every Vaishnava and Smarta Upanishad-pāṭha.
The Closing Prayer
The Upanishad ends with two haunting verses addressed to the Sun (Pūṣan) and to Agni at the moment of death.
हिरण्मयेन पात्रेण सत्यस्यापिहितं मुखम् ।
hiraṇmayena pātreṇa satyasyāpihitaṃ mukham
"The face of truth is hidden by a golden disk."
The petitioner asks the Sun to remove the dazzling disk so that he may see the truth beyond appearance, and asks Agni to lead him by the good path. This becomes, in many traditions, the final prayer recited at cremation.
Commentarial Traditions
The Isha has been commented on by all the major Vedantic ācāryas — Śaṅkara (Advaita), Rāmānuja (Viśiṣṭādvaita), Madhva (Dvaita), and others. Shankara's bhāṣya on the Isha is among his shortest and most accessible works. The Upanishad's unique embedding in the Samhita and its compressed expression of the entire Vedantic vision give it a status out of all proportion to its eighteen verses — Gandhi famously remarked that if all the Hindu scriptures were lost and only the Isha Upanishad remained, the essence of Hinduism would survive.