Life
The traditional biographies (the most cited is the Śaṅkaravijaya attributed to Mādhava-Vidyāraṇya) credit Śaṅkara with a life of extraordinary intensity: born at Kālāḍi in Kerala to a Nambūdiri brahmin family, a prodigious student of Sanskrit and Vedanta from childhood, renunciant at eight years, student of Govindapāda (himself a student of Gauḍapāda) by early adolescence, prolific commentarial writer and debater across the subcontinent, and dead at thirty-two.
The historicity of the traditional biographies is disputed — the dates, the precise itinerary, the claimed debates are not independently verifiable. What is historically certain: his texts exist, are internally consistent with a single authorial voice, and were composed within the Gauḍapāda lineage of the Advaita tradition. His teacher's teacher Gauḍapāda wrote the Māṇḍūkya Kārikā — the most systematically rigorous pre-Śaṅkara Advaita text — and Śaṅkara builds directly on its foundations.
He established four monastic centres (maṭha) at the cardinal points of the subcontinent — Śṛṅgeri (south), Dvārakā (west), Badarī (north), Purī (east) — which continue to function as centres of the Advaita tradition. The Śṛṅgeri Śāradā Pīṭha in Karnataka maintains the continuous line of teachers (paramparā) from Śaṅkara to the present.
Principal Works — Authentic Bhāṣyas
Scholarly consensus (Hacker 1995, Mayeda 1992) identifies the following as authentic. Many works attributed to Śaṅkara in popular tradition — including some devotional hymns and the Vivekacūḍāmaṇi — are disputed and may be by later authors of the same school.
| Work | Type | Significance |
|---|
ब्रह्मसूत्र भाष्य
Brahmasūtra Bhāṣya | Bhāṣya (commentary) | His magnum opus. Commentary on Bādarāyaṇa's Brahmasūtras — the systematic treatise on Vedānta. Establishes Advaita against Sāṃkhya, Mīmāṃsā, Buddhism, and Jainism. The foundation of all subsequent Advaita philosophy. |
बृहदारण्यक भाष्य
Bṛhadāraṇyaka Upaniṣad Bhāṣya | Bhāṣya | His longest Upaniṣad commentary. Detailed treatment of Yājñavalkya's dialogues, Aham Brahmāsmi, Neti Neti, and the three states of consciousness. |
चान्दोग्य भाष्य
Chāndogya Upaniṣad Bhāṣya | Bhāṣya | Extensive commentary on all nine Tat Tvam Asi dialogues. The most detailed Advaita treatment of the lakṣaṇā analysis of Tat Tvam Asi. |
माण्डूक्य भाष्य
Māṇḍūkya Upaniṣad Bhāṣya (with Gauḍapāda Kārikā) | Bhāṣya | Commentary on both the Upaniṣad and Gauḍapāda's Kārikā. Establishes the four-state analysis as the basis for Advaita's theory of consciousness. |
ईशा भाष्य
Īśā Upaniṣad Bhāṣya | Bhāṣya | Commentary on all 18 verses. The verse 2 commentary alone is famously longer than most Upaniṣads — a sustained treatment of the action vs. renunciation debate. |
कठ भाष्य
Kaṭha Upaniṣad Bhāṣya | Bhāṣya | Commentary on the Nachiketa dialogues and the chariot analogy. Treats the text as a complete Advaita teaching sequence. |
केन भाष्य
Kena Upaniṣad Bhāṣya | Bhāṣya | Commentary on "By whom is the mind directed?" — the inquiry into the knower behind knowing. |
मुण्डक भाष्य
Muṇḍaka Upaniṣad Bhāṣya | Bhāṣya | Detailed treatment of the higher and lower knowledge distinction. |
प्रश्न भाष्य
Praśna Upaniṣad Bhāṣya | Bhāṣya | Commentary on the six questions and answers. |
ऐतरेय भाष्य
Aitareya Upaniṣad Bhāṣya | Bhāṣya | Commentary including detailed treatment of Prajñānam Brahma. |
तैत्तिरीय भाष्य
Taittirīya Upaniṣad Bhāṣya | Bhāṣya | Treatment of the Pañcakośa model and the Satyam Jñānam Anantam definition of Brahman. |
भगवद्गीता भाष्य
Bhagavad Gītā Bhāṣya | Bhāṣya | Complete commentary establishing that the Gītā teaches jñāna (knowledge) as the direct means of liberation, not karma-yoga alone. |
उपदेशसाहस्री
Upadeśasāhasrī | Prakaraṇa (independent treatise) | His major independent philosophical work — "A Thousand Teachings." Prose and verse sections on Brahman-recognition and the method of nondual inquiry. Authentic per Mayeda (1992). |
The Prasthānatraya
Śaṅkara wrote commentaries on all three texts that constitute the prasthānatraya — the triple canonical basis of all Vedānta philosophy: the Upaniṣads (śruti prasthāna), the Bhagavad Gītā (smṛti prasthāna), and the Brahmasūtras (nyāya prasthāna). This triple commentary is what makes Advaita a fully systematic philosophical school — not just an interpretation of one text but a comprehensive reading of the entire Vedāntic canonical corpus. All subsequent Vedānta schools that challenged Advaita (Rāmānuja's Viśiṣṭādvaita, Madhva's Dvaita) were required to write their own commentaries on the same three texts to be taken seriously as complete philosophical positions.
The Adhyāsa Bhāṣya — His Starting Point
Before the Brahmasūtra Bhāṣya proper begins, Śaṅkara writes a short introduction (adhyāsa bhāṣya or preamble) that many scholars consider his most important philosophical statement. He identifies adhyāsa (superimposition — the mutual attribution of properties between self and not-self) as the root of all bondage. The entire problem of human existence is: we take the self (consciousness, subject) to be an object, and we take objects to be self. This mutual superimposition is the seed of desire, fear, and suffering. The entire inquiry of the Upaniṣads — and of Śaṅkara's commentary — is the systematic removal of this superimposition. Not by gaining something new, but by recognising the error that was always already the problem.