What is Sāṃkhya?
Sāṃkhya is one of the six classical darśanas, the orthodox philosophical schools of India. The name comes from the Sanskrit saṃkhyā, meaning number or enumeration. The school's method is a systematic count of the categories under which reality can be understood: twenty-five tattvas, or principles, covering consciousness, mind, body, senses, and the physical world. The foundational text is Īśvarakṛṣṇa's Sāṃkhya-Kārikā, composed in roughly the fourth or fifth century CE. Its seventy-two verses compress several centuries of oral teaching attributed to the sage Kapila. By the time the Kārikā was written, Sāṃkhya's analysis was already embedded in the [Bhagavad Gītā](lexicon:bhagavad-gita), the Mahābhārata's philosophical sections, the [Yoga Sūtras](lexicon:yoga-sutras), and early Buddhist and Jain responses. The twenty-five tattvas became the shared vocabulary that later Indian schools had to work with or argue against.
The two irreducible categories
Sāṃkhya's central claim is a strict dualism. Reality divides completely into two categories with nothing left over. Puruṣa is pure consciousness: contentless, eternal, plural in the classical reading, and never actually bound. Prakṛti is everything else: the physical world, the body, and also mind, intellect, the sense of self, and the senses. The twenty-four prakṛti tattvas descend in a fixed sequence. From mūla-prakṛti (the unmanifest source) comes mahat (the discriminating faculty), then ahaṃkāra (the I-maker), then manas (the coordinating mind), the five sense faculties, the five action faculties, the five subtle elements, and the five gross elements. Each is composed of the three guṇas: sattva (clarity), rajas (activity), and tamas (inertia), in varying proportions. Bondage is not a substance or a force. It is the misidentification by which puruṣa mistakes itself for the prakṛti contents that flow through it. Liberation, kaivalya, is the dropping of that mistake. The means is viveka: sustained discriminating discernment that recognises each named item as prakṛti and lets the witness stand undisguised.
Sāṃkhya and Yoga
Sāṃkhya analyses; it does not supply a practice. The companion school that does is Yoga. The medieval pairing, Sāṃkhya–Yoga, treats the two as the analytic and practical halves of a single system. The Yoga Sūtras take the Sāṃkhya enumeration and add the eight-limbed practical path: yama, niyama, āsana, prāṇāyāma, pratyāhāra, dhāraṇā, dhyāna, samādhi. Patañjali's defining line, yogaś cittavṛtti-nirodhaḥ, yoga is the cessation of the modifications of mind-stuff, uses Sāṃkhya's own vocabulary: citta is a prakṛti tattva; vṛtti is its movement; nirodha is the settling that allows puruṣa to be seen as itself. The one technical disagreement between the paired schools is īśvara, a special puruṣa untouched by the limits of the others. Yoga affirms it; the Kārikā declines to. The gap is small enough that the two schools have been functionally inseparable in practice for fifteen hundred years.
In the index
The classical Sāṃkhya text is not in the index, but the school's vocabulary runs through every practical tradition it underlies. Sadhguru's *Inner Engineering* and the Inner Engineering Online programme deliver the eight-limbed curriculum: the Shambhavi Mahamudra practice at the centre is, in classical terms, directed work on the subtler prakṛti tattvas. Sadhguru's longer-form lectures carry the same framework without naming the Sāṃkhya scaffolding. Paramahansa Yogananda's *Autobiography of a Yogi* works within the kriyā lineage, whose spinal-channel practices operate on the subtle body, the sūkṣma śarīra, which sorts within the school's enumeration. From the non-dual side, Nisargadatta Maharaj's *I Am That* and Rupert Spira's *Being Aware of Being Aware* describe the same recognition in a metaphysics that absorbs prakṛti into a single non-dual ground. Spira's *How the Infinite Knows the Finite* extends that investigation. Adyashanti's True Meditation and *Do Nothing* approach the same move from the angle that least resembles Sāṃkhya's enumeration but lands on the same recognition: seeing what changes apart from what does not.
Sāṃkhya vs. Advaita Vedānta and materialism
Sāṃkhya is not the dominant metaphysics of modern Indian thought. That place belongs to Advaita Vedānta. Śaṅkara's non-dualism holds that the apparent multiplicity of separate selves, and the apparent reality of prakṛti, are both māyā: appearances on a single consciousness without a second. The disagreement is real: Sāṃkhya keeps the plurality of puruṣas and the reality of prakṛti, while Advaita treats both as appearances on a non-dual ground. Sāṃkhya is also not materialism, despite sometimes being labelled dualist between mind and matter. The school's prakṛti includes mind, intellect, and the sense of self alongside the body and the physical world. The dividing line is between consciousness and everything that appears to it. Materialism says consciousness is produced by physical processes. Sāṃkhya says the physical and the mental are both prakṛti, and consciousness is the irreducible category that knows them. The two positions run in opposite directions.
