Not This, Not This

Adi Shankara, the Upanishads, and the Peeling Away of the False Self

A traveler walking along a country path at twilight sees a coiled, striped form lying across the dirt and leaps backward in terror, convinced he is facing a venomous snake. When a companion brings a lamp closer, the traveler sees that the object is only a discarded length of hemp rope. Around 788 CE in southern India, the philosopher Adi Shankara began his intellectual career before authoring his monumental Sanskrit commentary on the Brahma Sutras (Brahmasutrabhashya), which opens with this twilight optical illusion to diagnose the fundamental error of human consciousness, termed adhyasa—cognitive superimposition.

In Shankara's epistemological analysis, the human mind perpetually confuses two radically different categories: the pure observing subject (vishayin, the awareness that knows) and the observed object (vishaya, the physical body, sensory perceptions, and passing thoughts that are known). Just as the frightened traveler projects the remembered attributes of a snake onto the neutral substrate of the rope, waking awareness superimposes the limitations of the body and ego onto the unconditioned witness consciousness (Sakshin). Birth, fatigue, social rank, anxiety, and mortality belong strictly to the observed vehicle, yet the mind attributes them to the observer. Because the rope never actually turned into a snake, no physical weapon is required to kill the serpent. The terror vanishes solely through perceptual subtraction—removing the false attribution by recognizing what the substrate is not.

To execute this subtraction systematically, Shankara revived and formalized the apophatic formula of the ancient Brihadaranyaka Upanishad (II.3.6): neti, neti—literally not this, not this. Rather than attempting to describe ultimate reality (Brahman) or the foundational self (Atman) with positive adjectives, the investigator applies a single invariant rule of discrimination (viveka): whatever can be observed as a changing object in front of awareness cannot be the observer itself. Using the taxonomy of the Taittiriya Upanishad, Shankara guided students to peel away five concentric layers or sheaths (pancha-kosha) of mistaken identity.

First, the investigator examines the physical frame nourished by food (annamaya kosha). Because the anatomical body is perceived in space just like a clay pot or a woven coat, it is an object of awareness rather than the knower. Second, attention turns inward to the vital breath and physiological currents (pranamaya kosha) that animate the limbs during waking and sleep. These automatic rhythms rise and fall while the witness remains constant. Third, the practitioner observes the sensory-emotive mind (manomaya kosha), where desires, fears, and moods flare and subside; because one clearly notices when the mind is agitated or calm, the observer stands prior to the emotion. Fourth, the inquiry strips away the determinative intellect (vijnanamaya kosha)—the faculty of concepts, judgments, and personal agency—which vanishes every night during deep dreamless sleep. Fifth, even the subtle veil of peaceful blankness experienced in deep sleep (anandamaya kosha) is set aside as a transient state that comes and goes.

When all five objective sheaths have been negated through neti, neti, what remains is not an empty void, because the very act of negating requires a conscious witness present to execute the subtraction. Every doubt presupposes the doubter; every absence is witnessed by awareness. Unlike Western Cartesian doubt, which halted at the thinking ego—a verbal, personal intellect still trapped inside the fourth sheath—Shankara's subtraction cut beneath discursive thought to isolate featureless, non-dual awareness prior to individual personality. Before dying near the Himalayan shrine of Kedarnath around the age of thirty-two, Shankara established four monastic seats at the cardinal corners of the Indian subcontinent to preserve his commentaries on non-dual negation.