Ādi Śaṅkara
Great systematizer of Advaita (non-dual) Vedānta — Brahman alone is real.
Overview
The most influential exponent of Advaita (non-dualist) Vedānta and one of India's greatest philosophers. In commentaries on the Upanishads, the Bhagavad Gītā, and the Brahma Sūtras, he argued that ultimate reality is Brahman — pure, non-dual consciousness — and that the individual self (ātman) is identical with it. The plural world of appearances is māyā, a superimposition on Brahman rooted in ignorance (avidyā); liberation (mokṣa) comes from the knowledge 'that thou art' (tat tvam asi). He organized monastic orders across India in a short but astonishing life.
What they supported — and why
Non-dualism (Advaita)
SupportedUltimate reality is one, without a second — Brahman, pure consciousness; there is no real plurality.
WhyThe Upanishads teach one reality, and the deepest analysis of experience finds a single witnessing consciousness beneath all appearances.
Ātman is Brahman
SupportedThe innermost self is not different from ultimate reality.
WhyThe consciousness aware in all experience is the same undivided reality that is Brahman — 'that thou art'.
The world as māyā and ignorance (avidyā)
SupportedThe plural, changing world is a superimposition on Brahman due to ignorance — neither wholly real nor wholly unreal.
WhyAppearances arise from mistaking Brahman for the manifold (as a rope is mistaken for a snake); removing ignorance dissolves the error and reveals non-duality.
Causes championed
- Non-dual realization
- The authority of the Upanishads
- Liberation through knowledge
Issues wrestled with
- What is ultimately real?
- What is the self?
- How does the one appear as many?
Hurdles faced
- Reconciling non-duality with the evident plural world
- Debating Buddhists and rival Vedāntins across India within a short life
Works & books
2 catalogued. Status shows how much survives to today.
Commentaries (bhāṣya) on the Brahma Sūtras, principal Upanishads, and the Bhagavad Gītā
SurvivesThe foundational works of Advaita Vedānta.
Vivekacūḍāmaṇi (attributed)
AttributedA popular verse manual of non-dual realization traditionally ascribed to him.
Read the texts free
Their works online — Open Library catalogues 563 works & editions, 19 of them free to read in full.
The influence network
See Ādi Śaṅkara in the map →Influenced by
Influenced
In their words
“Brahman is real, the world is appearance, and the self is nothing but Brahman.”
— attributed summary of Advaita
Legacy
His Advaita Vedānta became the most influential school of Hindu philosophy and shaped Indian spirituality and its modern global expressions.
Further reading
Cross-checked against these authoritative references.