Sānkhya — The Philosophy of Cosmic Enumeration
Sānkhya (Sanskrit: सांख्य, 'number, enumeration, analysis') is one of the six āstika darśanas of Indian philosophy, traditionally attributed to the sage Kapila. The term sānkhya refers both to the method of enumeration by which reality is analyzed and to the tradition's claim to rational, discriminative knowledge (viveka-jñāna). The Sānkhya school presents a thoroughly dualistic cosmology: reality consists of exactly two ultimate principles — Puruṣa (pure, passive, contentless consciousness, eternally free) and Prakṛti (primordial undifferentiated matter, the source of all phenomenal existence). The interplay between the witnessing Puruṣa and the evolving Prakṛti generates the entire manifest universe through a sequence of 24 evolutes: mahat (cosmic intelligence), ahaṃkāra (ego-principle), the five tanmātrās (subtle essences of sound, touch, form, taste, smell), the five mahābhūtas (gross elements: space, air, fire, water, earth), the eleven indriyas (sense and motor organs plus manas). Together with the original Puruṣa these yield the famous 25-tattva framework. Liberation in classical Sānkhya is achieved when the Puruṣa recognizes its own eternal distinctness from Prakṛti (viveka-khyāti), ending the false identification that sustains bondage.
The Bhagavad Gītā's second chapter famously opens with Kṛṣṇa presenting 'Sānkhya' as the path of discriminative knowledge — specifically the knowledge that the ātman (the true self) is eternal, unborn, and indestructible, while the body is perishable matter. This usage is not the technical school of Kapila but the broader Vedic understanding of distinguishing the eternal from the non-eternal — a fundamental spiritual practice. The Sānkhya 25-tattva framework became so foundational that it was adopted, often with modifications, across diverse Indian philosophical and religious traditions, including Yoga (Patañjali's Yoga Sūtras presuppose Sānkhya metaphysics), Purāṇic cosmology, and Vedānta. The systematic analysis of Prakṛti's evolutes proved philosophically indispensable as a map of the inner and outer universe.
In Viśiṣṭādvaita Vedānta, Rāmānujācārya accepts the structural utility of Sānkhya's tattva framework while fundamentally rejecting its metaphysical dualism and atheism. Classical Sānkhya posits an infinite number of independent Puruṣas and an independent Prakṛti — a framework with no place for a supreme personal God (Īśvara). Rāmānuja's decisive correction: in Viśiṣṭādvaita, Prakṛti is not an independent reality but is Bhagavān's body (śarīra) and mode (prakāra) — it exists within, and is sustained by, the divine Person who is its inner controller (antaryāmin). The individual Puruṣas (jīvas) are likewise Bhagavān's body in the sense of being his inseparable modes. Thus the Sānkhyan categories are not discarded but are reinterpreted within the organic framework of the śarīra-śarīrī (body-soul) relationship that is central to Viśiṣṭādvaita.