The Maitrī Upaniṣad (मैत्र्युपनिषद्) — also called the Maitrāyaṇīya Upaniṣad after the Maitrāyaṇī recension of the Krishna Yajurveda to which it is attached — is the latest of the principal Upanishads. Modern scholars (Olivelle, Cowell) date its composition to roughly the last centuries BCE or the early centuries CE, several centuries after the great older Upanishads. Its lateness shows in its style, its vocabulary, and its preoccupations: more elaborate, more cosmologically systematized, and notably absorbed by the problem of the suffering body and the discipline of .
The Frame Narrative
The Upanishad opens with the figure of King Bṛhadratha — a great Ikshvāku monarch who, having renounced his kingdom in favor of his son and gone to the forest, sits in tapas facing the sun for a thousand days. The sage Śākāyanya appears and offers him a boon. replies with a long lament that has become famous in its own right:
अस्मिञ्छरीरे कामक्रोधलोभमोहभयविषादेर्ष्यानिष्टप्राप्तिप्रियविप्रयोग...
"In this body — afflicted by desire, anger, greed, delusion, fear, despair, envy, separation from the dear, union with the undesired, hunger, thirst, old age, death, disease, sorrow — what use is the enjoyment of pleasures?"
The lament continues for some length, cataloging the miseries of embodiment. asks only one thing: raise me up from this saṃsāra; teach me the way out.
The lament — and the king's request — set the tone of the entire . Where the earlier Upanishads largely take the world as given and inquire into its hidden ground, the opens with an explicit problem: the body is suffering, time consumes us, and we must learn how to be free.
Time and the Two Brahmans
Chapter six contains an extended meditation on kāla (time). Time is the great devourer, the great cosmic process; everything in the manifest world is food of time. Yet beyond time is the timeless brahman, the unchanging absolute.
The distinguishes between two aspects of brahman: the śabda-brahman (the sound-brahman, manifest as OM and as the Vedas) and the aśabda-brahman (the soundless brahman beyond all expression). One ascends from the first to the second through meditation. The teaching here is more systematic than in the older Upanishads, anticipating the formal distinctions of later Vedanta.
The Six-Limbed
The most influential single contribution of the is its description of ṣaḍaṅga-yoga — the "six-limbed yoga" — laid out in chapter six. The six limbs are:
- Prāṇāyāma — breath control.
- Pratyāhāra — withdrawal of the senses from their objects.
- Dhyāna — sustained meditation.
- Dhāraṇā — focused concentration.
- Tarka — discriminative reasoning on the object of meditation.
- Samādhi — absorption.
This schema is closely related to, but predates, the eight-limbed of Patanjali's Yoga Sūtras (which omits tarka and adds yama, niyama, and āsana). The Maitri's six limbs anticipate Patanjali's later inner four and supply important early evidence of the formalization of yogic practice in late Vedic India.
The Meditation on OM
The Upanishad gives extended attention to the meditation on AUM. The three letters are identified with the three Vedas, the three worlds, the three states of consciousness (waking, dream, deep sleep), the three guṇas, the three fires — every triadic structure in the cosmos is gathered into the syllable. The meditator who unifies all these threes into the one OM transcends them all and becomes one with the unsounded brahman beyond.
The Vision of the Cosmic Person
Chapter six also contains a striking passage in which the sun is described as the visible body of brahman:
य उद्यत्यान्तरादादित्यो हिरण्मयः पुरुषस्तस्य हिरण्यश्मश्रुर्हिरण्यकेशः ।
ya udyatyānterād ādityo hiraṇmayaḥ puruṣas tasya hiraṇyaśmaśrur hiraṇyakeśaḥ
"The sun that rises — within is the golden Person, his beard golden, his hair golden, golden to the very tips of his nails."
The vision recalls the Mundaka's description of the Person in the sun and prepares the way for later devotional theologies of the cosmic Vishnu and Surya.
Late Features
Several features mark the as later than the great Upanishads. Its Sanskrit shows post-Vedic vocabulary and occasional Buddhist-influenced phrasing. It mentions later philosophical schools and systematic categories. It uses the term māyā in a more developed sense than the Shvetashvatara, anticipating Shankara. And its sustained engagement with the problem of suffering shows the influence of the broader religious culture of post-Buddhist India.
Significance
The occupies an important transitional position. Backward, it preserves much of the earlier Upanishadic vocabulary and meditative method. Forward, it points toward classical , toward systematic Vedanta, and toward the bhakti theology of the Bhagavad Gita and the Puranas. As a teaching text it is less cited than the older Upanishads, but as evidence for the developmental phase between the Upanishadic and the classical periods of Indian religion, it is invaluable.