--- title: "Māṇḍūkya Upaniṣad — Verse 10: The Letter U — Dream and Excellence — Advaita & Upanishads Codex" slug: "upanishads-mandukya-verse-10" type: "verse" category: "mandukya-upanishad" url: "https://thecodex.expert/advaita/upanishads/mandukya/verse-10/" url_json: "https://thecodex.expert/advaita/api/v1/entries/upanishads-mandukya-verse-10" source_citation: "Māṇḍūkya Upaniṣad 1.10 · Trans. Swami Gambhirananda (Advaita Ashrama, 2009)" confidence: "high" author: "LUDIFU" last_updated: "2026-04-27" word_count: 4982 cite_as: "Māṇḍūkya Upaniṣad — Verse 10: The Letter U — Dream and Excellence — Advaita & Upanishads Codex, Advaita & Upanishads Codex, https://thecodex.expert/advaita/upanishads/mandukya/verse-10/, last updated 2026-04-27." --- # Māṇḍūkya Upaniṣad **Source:** Māṇḍūkya Upaniṣad 1.10 · Trans. Swami Gambhirananda (Advaita Ashrama, 2009) **URL:** https://thecodex.expert/advaita/upanishads/mandukya/verse-10/ **Type:** verse **Category:** mandukya-upanishad **Confidence:** High — sourced from Tier 1/2 academic translations **Last updated:** 2026-04-27 ## Summary Māṇḍūkya Upaniṣad Verse 10: The Letter U — Dream and Excellence. Three reading levels. ## Content ## Verse 10: The Second Correspondence — Taijasa and the Letter U ## The Practical Benefit of the U-Taijasa Recognition ## U as the Intermediate Phoneme ## Ubhayatva: Being Common to Both ## Verse 10 and the Practice of Dream Investigation ## The Elevation of Knowledge: What "Equal Knowledge" Means ## U and the Upanishadic Account of Dreams ## The Sequence A-U-M: A Contemplative Arc ## Taijasa as the Teacher of Creativity ## Verse 10 in the Tradition: Gauḍapāda and Śaṅkara ## Summary: Verse 10 in the Arc ## The Self-Luminosity of U: Phonological Contemplation Māṇḍūkya Upaniṣad — Verse 10: The Letter U — Dream and Excellence — Advaita & Upanishads Codex Home › Upanishads › Māṇḍūkya › Verse 10 Last verified: April 2026 · Source: Māṇḍūkya Upaniṣad 1.10 · Trans. Swami Gambhirananda (Advaita Ashrama, 2009) Māṇḍūkya Upaniṣad · Verse 10 of 12 · Oṃ · Letter U · Dream correspondence The Letter U — Dream and Excellence Hub 1 2 3 4 5 6 7 8 9 10 11 12 🟢 Curious 🔵 Exploring 🔴 Deep Dive Layer 1 — What it literally says स्वप्नस्थानस्तैजस उकारो द्वितीया मात्रोत्कर्षाद्युभयत्वाद्वोत्कर्षति ह वै ज्ञानसन्ततिं समानश्च भवति नास्याब्रह्मवित्कुले भवति य एवं वेद ॥ svapna-sthānas taijasa ukāro dvitīyā mātrā utkarpād ubhayatvād vā · utkarṣati ha vai jñāna-santatiṃ samānaś ca bhavati · nāsyābrahma-vit-kule bhavati ya evaṃ veda In plain English The dream state, Taijasa, is the letter U — the second measure — on account of excellence and middleness. Who knows this elevates the stream of knowledge and becomes equal to all; in their lineage no one who does not know Brahman is born. Layer 2 — What it means U is the middle sound — between the open A and the closed M. It is neither fully open nor fully closed. The dream state has this same quality: it is the middle state between the outward-directed waking experience and the inward collapse of deep sleep. The dreaming mind goes inward, but not all the way. The characteristic associated with U is excellence — utkarṣa — and the quality of being between two things — ubhayatva . The dream state excels in one remarkable way: it shows consciousness at its most creative. In dream, consciousness constructs an entire world from itself, without any external input. This is, in a sense, consciousness at full creative capacity — which is why it corresponds to U's quality of excellence. The continuity of knowledge mentioned as the result — the elevation of the stream of knowledge — points toward what the inquiry into dream ultimately reveals: consciousness is self-luminous, it does not need the world to illuminate it. Layer 3 — What it points to Reading this page will give you the concept clearly. But the Upanishads were not written to be understood the way you understand chemistry or history. They were written to point toward something you can only recognise in yourself. That recognition is not on this page. This page only clears the way. Verse 10: The Second Correspondence — Taijasa and the Letter U Verse 10 establishes the second correspondence in the Oṃ-mapping: Taijasa (the dreaming self) corresponds to U, the second phoneme of the syllable. The two principles that justify this correspondence are utkarṣa (exaltation, elevation, superiority) and ubhayatva (being in the middle, being between, being common to both). These principles characterise something precise about both U and Taijasa: they are elevated beyond the first stage and they occupy the intermediate position between the first and the third. Utkarṣa means being raised up, superior, elevated. U is "above" A in the phonological sequence — it is the second step, built upon the foundation of A, and in Sanskrit phonological understanding it has a quality of being "higher" or more refined than A. Taijasa, the dreaming self, is similarly elevated beyond Viśva: it is not dispersed into the gross world through the senses but turned inward, generating its own luminous world. The dreaming state is "higher" in the sense of being more interior, more self-sufficient, more clearly the self's own creation rather than the self's engagement with an apparently external world. The elevation of U and Taijasa is thus not moral or spiritual elevation but structural elevation — they occupy the intermediate position between the most dispersed and the most unified states. Ubhayatva means "twoness" or "being common to both." U is the phoneme that arises from A and leads to M — it is the middle element, the one that is in between the first and the third, that has something of both. Taijasa similarly stands between Viśva (most dispersed, gross-world-engaged) and Prājña (most unified, objectless): the dreaming self is more collected than the waking self (not engaged with external objects) but more differentiated than the deep-sleep self (still generating and engaging with subtle objects). U is the sound that connects A to M; Taijasa is the consciousness that connects waking to deep sleep. The Practical Benefit of the U-Taijasa Recognition The practical benefit of the U-Taijasa correspondence, as stated in verse 10, is that "one's knowledge becomes equal" — that the meditator develops an evenness or equanimity of knowledge across waking and dreaming experience. This is a more subtle benefit than verse 9's "achieving all desires," and it reflects the more subtle nature of the dreaming state itself. The dream, as Taijasa's domain, is the arena in which the waking consciousness's residues and impressions are reconfigured. A student who has recognised the dreaming consciousness as the expression of U — as the elevated, interior, luminous mode of Brahman-consciousness — no longer treats the dreaming state as simply an anomalous interruption of waking or as irrelevant to the spiritual path. Instead, the dreaming state is recognised as another facet of the same investigation: the same consciousness that engages with the gross world in waking generates its own world in dreaming, and both are expressions of Brahman-consciousness. This "equalising of knowledge" means recognising that the investigation of consciousness does not stop when waking ends and dreaming begins; the investigation continues across all states, because consciousness — the subject of the investigation — continues across all states. The student who has understood verse 10's U-Taijasa correspondence has taken a significant step toward the all-state awareness that the tradition calls sahaja samādhi : the natural, effortless recognition of turīya that persists across all states of consciousness, not as a special meditative achievement but as the alway --- *Cite as: "Māṇḍūkya Upaniṣad — Verse 10: The Letter U — Dream and Excellence — Advaita & Upanishads Codex", Advaita & Upanishads Codex, https://thecodex.expert/advaita/upanishads/mandukya/verse-10/, last updated 2026-04-27.* *Part of [Advaita & Upanishads Codex](https://thecodex.expert/advaita) — a LUDIFU knowledge project.*