The principal Upaniṣads, one by one

Thirteen texts, each short enough to be read in an afternoon and deep enough to have sustained two thousand years of commentary.

Īśa Upaniṣad

Eighteen verses, embedded in the Yajurveda Saṁhitā itself. Its achievement is to refuse the choice between world and renunciation: enjoy by renouncing, and covet no one's wealth. It condemns the pursuit of ritual without knowledge and of knowledge without action in the same breath, and ends with the prayer to the golden disc that covers the face of truth.

Kena Upaniṣad

It begins with four questions: by whom willed does the mind go forth, by whom is the breath directed, by whom is speech uttered, what god directs the eye and ear? The answer is the ear of the ear, the mind of the mind — that which cannot be an object of knowing because it is the knower. Its most famous line is that Brahman is not understood by those who claim to understand, and understood by those who say they do not.

Kaṭha Upaniṣad

The boy Naciketas is given to Death by his father in anger, waits three nights at Yama's door, and is offered three boons. With the third he asks what remains after a person dies. Yama offers him sons, cattle, land, long life and every pleasure to avoid the question; Naciketas refuses them all. What follows is the clearest teaching on the Self in the corpus, including the chariot image — the body as chariot, intellect as charioteer, mind as reins, senses as horses, the objects as the road, and the Self as the passenger who owns the journey.

Praśna Upaniṣad

Six students bring six questions to the sage Pippalāda: where do creatures come from; how many powers sustain the body; how does prāṇa enter and divide; what sleeps and what wakes; what is gained by meditating on Om; and who is the person with sixteen parts. The treatment of prāṇa and its five divisions here is foundational for all later yoga.

Muṇḍaka Upaniṣad

It opens by dividing knowledge in two: aparā vidyā, the lower — including all four Vedas and the six limbs — and parā vidyā, the higher, by which the imperishable is known. This is the tradition's own statement that textual mastery is not the goal. It gives the image of two birds on one tree, one eating the fruit and one watching without eating, and the line now on India's state emblem: satyam eva jayate — truth alone triumphs.

Māṇḍūkya Upaniṣad

Twelve verses, the shortest of the principal Upaniṣads, and the one the Muktikā says suffices alone for liberation. It analyses consciousness into four: waking (vaiśvānara), dream (taijasa), deep sleep (prājña), and the fourth (turīya) which is not a state but their ground — and maps them onto A, U, M and the silence after Om. Gauḍapāda's Kārikā on it is the earliest systematic Advaita text.

Taittirīya Upaniṣad

Three chapters. The first is the śikṣā-vallī, ending with the graduation address a teacher gives a departing student — speak the truth, practise dharma, let your mother be a god to you, let your father be a god to you — the oldest convocation speech in the world. The second gives the pañca-kośa: the five sheaths of food, breath, mind, understanding and bliss. The third gives Bhṛgu's enquiry, in which he returns five times to his father with a deeper answer to 'what is Brahman?'

Aitareya Upaniṣad

Creation proceeds from the Self alone; the cosmic person is formed, the deities enter the body through its openings, and the Self enters last through the crown. Its mahāvākya is prajñānaṁ brahma — consciousness is Brahman.

Chāndogya Upaniṣad

Eight chapters of the Sāmaveda tradition. It contains the teaching of Uddālaka Āruṇi to his son Śvetaketu, who returns from twelve years of study proud of his learning; his father asks whether he has learnt that by which the unheard becomes heard. The chapter ends nine times with tat tvam asi — that thou art. It also contains the dialogue of Nārada and Sanatkumāra, the honey doctrine, and the teaching that what a person's conviction is in this world, that they become.

Bṛhadāraṇyaka Upaniṣad

The largest and, with the Chāndogya, the oldest. It contains Yājñavalkya's dialogues — with the assembled scholars of Janaka's court, with Gārgī who questions him until he warns her that her head will fall off, and above all with his wife Maitreyī, whom he tells that a husband is dear not for the husband's sake but for the sake of the Self. Its method is neti neti — not this, not this — the systematic refusal of every description, and its prayer is the one recited across the world: lead me from the unreal to the real, from darkness to light, from death to immortality.

Śvetāśvatara, Kauṣītaki and Maitrāyaṇīya

Śvetāśvatara is the most theistic of the classical Upaniṣads — it names Rudra as the one Lord, uses the vocabulary of Sāṅkhya and Yoga, and is a principal source for Śaiva Vedānta. Kauṣītaki treats prāṇa and the after-death path in detail. Maitrāyaṇīya gives an early and vivid account of the mind as the cause of bondage and freedom alike.

॥ ❖ ॥

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