Sankhya enumerates 25 tattvas — 2 eternal principles (Purusha + Prakriti) and 23 evolutes of Prakriti that unfold in strict sequence. Each tattva is more subtle and pervasive than the one below it.
The two eternal principles
№ 01
Purusha
पुरुष(puruṣa)Pure consciousness — the eternal witness (sakshi). Beyond all change, action, and attribute. Plural in classical Sankhya (many purushas, not one).
Function — Witnesses (drashta) but does nothing. Its mere presence triggers the unfolding of Prakriti, the way iron filings stir near a magnet.
№ 02
Prakriti
प्रकृति(prakṛti)Primordial unmanifest matter (mula-prakriti). The single root cause of all manifestation. Holds the three gunas (sattva, rajas, tamas) in perfect equilibrium until disturbed.
Function — Provides the substance that evolves into all 23 evolutes. Unconscious yet purposive — it "acts" only for the liberation of Purusha.
Antahkarana — internal organs (3)
№ 03
Intellect (Mahat / Buddhi)
महत् / बुद्धि(mahat / buddhi)The first evolute of Prakriti. Cosmic intellect on the macro scale; individual buddhi on the micro scale. The faculty of decision, discrimination, and dharma-recognition.
Function — Discriminates real from unreal, dharma from adharma, self from non-self. The screen on which Purusha's consciousness reflects.
№ 04
Ego (Ahankara)
अहङ्कार(ahaṅkāra)The "I-maker" — the principle of self-appropriation that says "I am the doer", "this is mine". Splits into sattvic (giving rise to manas + 10 indriyas) and tamasic (giving rise to 5 tanmatras → 5 mahabhutas).
Function — Personalises experience. Without it, raw cognition would not become "MY" thought, "MY" perception. The root of samsara — and the seat of bondage.
№ 05
Mind (Manas)
मनस्(manas)The coordinating mind. Bridges sense organs (jnanendriyas) and action organs (karmendriyas). Both a jnanendriya AND a karmendriya in function — the 11th indriya.
Function — Receives sense data, sorts it, presents it to buddhi for decision, then dispatches buddhi's verdict to the karmendriyas. The switchboard of cognition.
Jnanendriyas — 5 sense organs
№ 06
Ear (Shrotra)
श्रोत्र(śrotra)The subtle faculty of hearing. NOT the physical ear — the cognitive power that converts vibration into "sound heard". Corresponds to akasha (space) at the elemental level.
Function — Perceives sound (shabda). The primary jnanendriya in Vedic culture — shruti (revelation) is "that which is heard".
№ 07
Skin (Tvak)
त्वक्(tvak)The faculty of touch. Distributed throughout the body. Corresponds to vayu (air) at the elemental level — air is the medium of contact.
Function — Perceives sparsha (touch — temperature, pressure, texture). The most pervasive jnanendriya.
№ 08
Eye (Chakshus)
चक्षुस्(cakṣus)The faculty of sight. NOT the eyeball — the cognitive power that interprets light as "form seen". Corresponds to agni (fire) at the elemental level — sight depends on light.
Function — Perceives rupa (form, colour, shape). Most prominent jnanendriya in modern cognition.
№ 09
Tongue (Rasana / Jihva)
रसना / जिह्वा(rasanā / jihvā)The faculty of taste. Corresponds to jala (water) at the elemental level — taste arises only when substance dissolves in saliva.
Function — Perceives rasa (taste — sweet, sour, salty, bitter, pungent, astringent in Ayurveda).
№ 10
Nose (Ghrana)
घ्राण(ghrāṇa)The faculty of smell. Corresponds to prithvi (earth) at the elemental level — smell is the densest, most material perception.
Function — Perceives gandha (smell). The most primal sense — first cognised by infants, last lost in dying.
Karmendriyas — 5 action organs
№ 11
Speech (Vak)
वाक्(vāk)The faculty of articulation. Centred in throat / tongue / lips. The most refined karmendriya — Vedic culture identifies vak with Saraswati and treats speech as sacred.
Function — Produces speech, mantra, song. The expression channel of buddhi.
№ 12
Hands (Pani)
पाणि(pāṇi)The faculty of grasping and manipulating. The hand is the instrument that transformed humanity from primate to civilisation — tool-making, ritual mudras, writing.
Function — Grasps (adana). All purposeful manipulation of objects.
№ 13
Feet (Pada)
पाद(pāda)The faculty of locomotion. Carries the body through space — pilgrimage (yatra), circumambulation (pradakshina), the lived journey of life.
Function — Movement (gamana). Transport of the body from place to place.
№ 14
Anus (Payu)
पायु(pāyu)The faculty of excretion. Eliminates what the body cannot use. Without proper functioning, agni (digestive fire) collapses.
Function — Elimination (visarga). Removal of waste; release of tamasic residue.
№ 15
Genitals (Upastha)
उपस्थ(upastha)The faculty of generation. Source of new life. In yoga + tantra, this is the seat of ojas — the most refined essence of bodily energy.
Function — Procreation (ananda) and reproduction. Transmutation possible via brahmacharya / urdhva-retas.
Tanmatras — 5 subtle elements
№ 16
Sound (Shabda-tanmatra)
शब्द तन्मात्र(śabda-tanmātra)The subtle essence of sound. The "thing" that the ear perceives. Precedes audible sound; the seed of vibration before manifestation.
Function — When condensed, produces akasha (space). Cognised by shrotra.
№ 17
Touch (Sparsha-tanmatra)
स्पर्श तन्मात्र(sparśa-tanmātra)The subtle essence of touch. Pure tactile quality before any specific texture.
Function — When condensed (with shabda), produces vayu (air). Cognised by tvak.
№ 18
Sight (Rupa-tanmatra)
रूप तन्मात्र(rūpa-tanmātra)The subtle essence of form and colour. Pure visibility before any specific image.
Function — When condensed (with shabda + sparsha), produces agni (fire). Cognised by chakshus.
№ 19
Taste (Rasa-tanmatra)
रस तन्मात्र(rasa-tanmātra)The subtle essence of flavour. Pure savour before any specific taste.
Function — When condensed (with shabda + sparsha + rupa), produces jala (water). Cognised by rasana.
№ 20
Smell (Gandha-tanmatra)
गन्ध तन्मात्र(gandha-tanmātra)The subtle essence of smell. Pure odour-quality before any specific scent.
Function — When condensed (with all four prior), produces prithvi (earth). Cognised by ghrana.
Mahabhutas — 5 gross elements
№ 21
Space (Akasha)
आकाश(ākāśa)The first gross element. Carries the property of sound alone. The medium in which all other elements arise. Subtlest of the five mahabhutas.
Function — Provides the field for vibration, movement, and form. Inside the body — empty spaces, hollow organs.
№ 22
Air (Vayu)
वायु(vāyu)The second mahabhuta. Carries sound + touch. The principle of motion and dryness.
Function — Moves everything. Inside the body — the five pranas, respiration, circulation, nerve impulses. The vata dosha of Ayurveda.
№ 23
Fire (Agni / Tejas)
अग्नि / तेजस्(agni / tejas)The third mahabhuta. Carries sound + touch + sight. Principle of transformation, heat, and light.
Function — Cooks, digests, illumines. Inside the body — digestive fire (jatharagni), body heat, metabolic enzymes. The pitta dosha.
№ 24
Water (Jala / Apas)
जल / आपस्(jala / āpas)The fourth mahabhuta. Carries sound + touch + sight + taste. Principle of cohesion, fluidity, and refreshment.
Function — Binds, dissolves, nourishes. Inside the body — blood, lymph, saliva, all fluids. The kapha dosha (with earth).
№ 25
Earth (Prithvi)
पृथ्वी(pṛthvī)The fifth and densest mahabhuta. Carries all five subtle qualities — sound, touch, sight, taste, smell. The most material element.
Function — Provides solidity, structure, mass. Inside the body — bones, muscles, hair, nails, skin. Together with water forms the kapha dosha.