Where does aham brahmasmi come from?

The Brihadaranyaka Upanishad, 1.4.10, in the Shukla Yajur Veda. It is counted among the four mahavakyas.

Does aham brahmasmi mean "I am God"?

Brahman is the one reality behind everything. Shankara reads the sentence as the self recognising it was never other than that; Ramanuja reads it as the self knowing Brahman as its inner Self.

Aham brahmasmi: I am Brahman

Aham brahmasmi ("I am Brahman") is from the Brihadaranyaka Upanishad 1.4.10, in the Shukla Yajur Veda. In the beginning, the text says, Brahman knew itself as "I am Brahman" and so became all. Whoever knows the same, then or now, becomes all of this, and even the gods cannot stand in the way.

Brihadaranyaka Upanishad 1.4.10

अहं ब्रह्मास्मि

ahaṃ brahmāsmi

I am Brahman.

The whole passage

Brihadaranyaka Upanishad 1.4.10

ब्रह्म वा इदमग्र आसीत् तदात्मानमेवावेदहं ब्रह्मास्मीति ।तस्मात्तत्सर्वमभवत् तद्यो यो देवानां प्रत्यबुध्यत स एव तदभवत्तथर्षीणां तथा मनुष्याणाम् ।तद्धैतत्पश्यन्नृषिर्वामदेवः प्रतिपेदेऽहं मनुरभवं सूर्यश्चेति ।तदिदमप्येतर्हि य एवं वेदाहं ब्रह्मास्मीति इति स इदं सर्वं भवतितस्य ह न देवाश्चनाभूत्या ईशत आत्मा ह्येषां स भवत्यथ योऽन्यांदेवतामुपास्तेऽन्योऽसावन्योऽहमस्मीति न स वेद ।यथा पशुरेवं स देवानाम् ।यथा ह वै बहवः पशवो मनुष्यंभुञ्ज्युरेवमेकैकः पुरुषो देवान्भुनक्त्येकस्मिन्नेव पशावादीयमानेऽप्रियंभवति किमु बहुषु तस्मादेषां तन्न प्रियं यदेतन्मनुष्या विद्युः ॥

brahma vā idamagra āsīt tadātmānamevāvedahaṃ brahmāsmīti |tasmāttatsarvamabhavat tadyo yo devānāṃ pratyabudhyata sa eva tadabhavattatharṣīṇāṃ tathā manuṣyāṇām |taddhaitatpaśyannṛṣirvāmadevaḥ pratipede'haṃ manurabhavaṃ sūryaśceti |tadidamapyetarhi ya evaṃ vedāhaṃ brahmāsmīti iti sa idaṃ sarvaṃ bhavatitasya ha na devāścanābhūtyā īśata ātmā hyeṣāṃ sa bhavatyatha yo'nyāṃdevatāmupāste'nyo'sāvanyo'hamasmīti na sa veda |yathā paśurevaṃ sa devānām |yathā ha vai bahavaḥ paśavo manuṣyaṃbhuñjyurevamekaikaḥ puruṣo devānbhunaktyekasminneva paśāvādīyamāne'priyaṃbhavati kimu bahuṣu tasmādeṣāṃ tanna priyaṃ yadetanmanuṣyā vidyuḥ ||

In the beginning this was Brahman. It knew only itself: "I am Brahman." So it became all. Whoever among the gods woke to this became that, and so with the sages and with people. Seeing this, the sage Vamadeva said, "I was Manu, and the sun." Even now, whoever knows "I am Brahman" becomes all of this. Even the gods cannot stop him, for he becomes their Self. But one who worships another god, thinking "he is one and I am another", does not know.

Who said it, and to whom

The Upanishad, telling how things began

This comes in the Brihadaranyaka’s account of the beginning. Before anything else there was Brahman, and it knew only itself. The passage says the same knowing is open to gods, sages and people, and names the sage Vamadeva, who saw it. It ends with a warning about worship that keeps the god at a distance.

How the acharyas read it

Shankara

Shankara reads the sentence as knowing what already is. Nothing new is gained: the self was always Brahman, and only ignorance hid it. "Became all" means the sense of being a limited someone fell away.

Where others read it differently

Ramanuja reads "I" as reaching through the self to Brahman, who lives in it as its inner Self; the self is Brahman’s body and never the whole of Brahman. Madhva’s school reads the line as the self’s likeness to, and dependence on, Brahman.

Writing it out

अहं ब्रह्मास्मिahaṃ brahmāsmiTwo words

अहम् ends in म्, which becomes the dot (anusvara) before ब: अहं. In the text it runs on as वेदहं ब्रह्मास्मीति, "knew: I am Brahman".

Copy or share the line

अहं ब्रह्मास्मि

ahaṃ brahmāsmi

I am Brahman.

Brihadaranyaka Upanishad 1.4.10

The same thought in the Gita

Read next to Bhagavad Gita 7.19: Krishna: after many births the one who knows reaches me, seeing that Vasudeva is all.

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Questions people ask

Where does aham brahmasmi come from?: The Brihadaranyaka Upanishad, 1.4.10, in the Shukla Yajur Veda. It is counted among the four mahavakyas.
Does aham brahmasmi mean "I am God"?: Brahman is the one reality behind everything. Shankara reads the sentence as the self recognising it was never other than that; Ramanuja reads it as the self knowing Brahman as its inner Self.

Sources and method

Brihadaranyaka Upanishad 1.4.10, Shukla Yajur Veda. Sanskrit from the Wisdom corpus, read against the sanskritdocuments.org edition (KB up_brihadaranyak.78, up_brihadaranyak.79, up_brihadaranyak.80). Three corpus records (KB up_brihadaranyak.78 to .80) merged into one section.

The English is Wisdom's own, drafted from the Sanskrit with Shankara's commentary (S. Sitarama Sastri's public-domain English) and checked against Swami Paramananda (1919) for tone. Wisdom translation, edited by Ankur Shukla. Commentary AI-drafted, under human review.