Advaita Vedānta, as articulated by Ādi Śaṅkarācārya, is a non-dualistic vision of reality in which Brahman alone is ultimately real. Brahman is described as the absolute, formless, attributeless consciousness, often characterized as existence–consciousness–bliss, beyond all limitation and change. The term “Advaita” literally means “not two,” indicating that what appears as multiplicity is, at the deepest level, nothing other than this one reality. From this standpoint, the world of diversity is not denied as a practical experience, but it is not granted the same status of reality as Brahman.

A central insight of this tradition is the identity of Ātman and Brahman: the innermost Self of each being is not the body, mind, or ego, but the very same consciousness that is the ground of all existence. This is expressed in the mahāvākya “tat tvam asi” – “That thou art” – which points to the non-dual unity of the individual and the absolute. The sense of being a separate, limited individual (jīva) arises from avidyā, ignorance of this true nature. Under the influence of this ignorance, a world of plurality and separation appears, a process spoken of as māyā, the power by which Brahman seems to manifest as manifold.

Advaita Vedānta distinguishes different levels of reality to clarify this situation. On the paramārthika level, the absolute standpoint, only Brahman is real. On the vyāvahārika level, the empirical standpoint, the world and individual selves function and are taken as real for all practical purposes. There is also the pratibhāsika level, the merely apparent reality of dreams, illusions, and perceptual errors, which helps illustrate how something can appear without being ultimately real. The classic example is mistaking a rope for a snake: the snake is experienced, yet it has no independent reality apart from the rope.

Liberation, or mokṣa, in this vision is not the acquisition of something new but the removal of ignorance through knowledge (jñāna). This knowledge is a direct recognition that one’s true Self is Brahman and has never been bound, even while bondage was experienced. The traditional disciplines leading to this realization include attentive listening to the Upaniṣadic teaching (śravaṇa), reflective inquiry to remove doubts (manana), and deep contemplation or meditation (nididhyāsana) to dissolve habitual misidentification with body and mind. Through such inquiry, the apparent separation between seeker, world, and ultimate reality is seen as a product of ignorance, and what remains is the non-dual fullness of Brahman alone.

The scriptural foundation for this teaching is the triad of the Upaniṣads, the Bhagavad Gītā, and the Brahma Sūtras, collectively known as the prasthāna-trayī. Śaṅkara’s commentaries on these texts present a consistent non-dual interpretation, shaping Advaita Vedānta into a systematic philosophical and spiritual path. Within this framework, ritual and devotion are not rejected but are understood as preparatory means that purify and steady the mind for the higher pursuit of knowledge. The heart of the path, however, lies in the clear discernment that the Self is ever free, ever one with Brahman, while all limitation belongs only to the realm of appearance.