Sankya Darshana (Original Sanskrit Text)

Epistemology
According to the Sankhya school, all knowledge is possible through three pramanas (means of valid knowledge) -

1. Pratyaksha or Drishtam - direct sense perception,
2. Anumana - logical inference and
3. Sabda or Aptavacana - verbal testimony.

Sankhya cites two kinds of perceptions: Indeterminate (nirvikalpa) perceptions and determinate (savikalpa) perceptions.

Indeterminate perceptions are merely impressions without understanding or knowledge. They reveal no knowledge of the form or the name of the object. There is only external awareness about an object. There is cognition of the object, but no discriminative recognition.

For example, a baby’s initial experience is full of impression. There is a lot of data from sensory perception, but there is little or no understanding of the inputs. Hence they can be neither differentiated nor labeled. Most of them are indeterminate perceptions.

Determinate perceptions are the mature state of perceptions which have been processed and differentiated appropriately. Once the sensations have been processed, categorized, and interpreted properly, they become determinate perceptions. They can lead to identification and also generate knowledge.

Metaphysics
Ontology
Broadly, the Samkhya system classifies all objects as falling into one of the two categories: Purusha and Prakriti. Metaphysically, Samkhya maintains an intermingled duality between spirit/consciousness (Purusha) and matter (Prakrti).
 

Purusha
Purusha is the Transcendental Self or Pure Consciousness. It is absolute, independent, free, imperceptible, unknowable, above any experience and beyond any words or explanation. It remains pure, “nonattributive consciousness ”. Purusha is neither produced nor does it produce. Unlike Advaita Vedanta and like Purva-Mimamsa, Samkhya believes in plurality of the Purushas.

Prakriti
Prakriti is the first cause of the universe—of everything except the Purusha, which is uncaused, and accounts for whatever is physical, both matter and force. Since it is the first principle (tattva) of the universe, it is called the Pradhana, but, as it is the unconscious and unintelligent principle, it is also called the Jada. It is composed of three essential characteristics (trigunas). These are:

* sattva - fineness, lightness, illumination, and joy;
* rajas - activity, excitation, and pain;
* tamas - coarseness, heavyness, obstruction, and sloth.

All physical events are considered to be manifestations of the evolution of Prakriti, or primal nature (from which all physical bodies are derived). Each sentient being is a Purusha, and is limitless and unrestricted by its physical body. Samsaara or bondage arises when the Purusha does not have the discriminate knowledge and so is misled as to its own identity, confusing itself with the physical body, which is actually an evolute of Prakriti. The spirit is liberated when the discriminate knowledge of the difference between conscious Purusha and unconscious Prakriti is realized.

Ishvara (Creationist God)
The Sāṁkhyapravacana Sūtra states that there is no philosophical place for a creationist God in this system. It is also argued in this text that the existence of Ishvara cannot be proved and hence cannot be admitted to exist[14] and an unchanging Ishvara as the cause cannot be the source of a changing world as the effect. Almost all modern scholars are of view that the concept of Ishvara was incorporated into the nirishvara (atheistic) Samkhya viewpoint only after it became associated with the Yoga, the Pasupata and the Bhagavata schools of philosophy. This theistic Samkhya philosophy is described in the Mahabharata, the Puranas and the Bhagavad Gita.

Nature of Duality
The Samkhya recognizes only two ultimate entities, Prakriti and Purusha. While the Prakriti is a single entity, the Samkhya admits a plurality of the Purushas. Unintelligent, unmanifest, uncaused, ever-active, imperceptible and eternal Prakriti is alone the final source of the world of objects which is implicitly and potentially contained in its bosom. The Purusha is considered as the intelligent principle, a passive enjoyer (bhokta) and the Prakriti is the enjoyed (bhogya). Samkhya believes that the Purusha cannot be regarded as the source of inanimate world, because an intelligent principle cannot transform itself into the unintelligent world. It is a pluralistic spiritualism, atheistic realism and uncompromising dualism.[13] See Dualism#Consciousness/Matter_dualism.

Theory of Existence
The Sankhya system is based on Satkaryavada. According to Satkaryavada, the effect pre-exists in the cause. Cause and effect are seen as different temporal aspects of the same thing - the effect lies latent in the cause which in turn seeds the next effect.

More specifically, Sankhya system follows the Prakriti-Parinama Vada. Parinama denotes that the effect is a real transformation of the cause. The cause under consideration here is Prakriti or more precisely Mula-Prakriti (Primordial Matter). The Sankhya system is therefore an exponent of an evolutionary theory of matter beginning with primordial matter. In evolution, Prakriti is transformed and differentiated into multiplicity of objects. Evolution is followed by dissolution. In dissolution the physical existence, all the worldly objects mingle back into Prakriti, which now remains as the undifferentiated, primordial substance. This is how the cycles of evolution and dissolution follow each other.
[edit] The twenty-four principles

Sankhya theorizes that Prakriti is the source of the world of becoming. It is pure potentiality that evolves itself successively into twenty four tattvas or principles. The evolution itself is possible because Prakriti is always in a state of tension among its constituent strands -

* Sattva - a template of balance or equilibrium;

* Rajas - a template of expansion or activity;

* Tamas - a template of inertia or resistance to action.

All macrocosmic and microcosmic creation uses these templates. The twenty four principles that evolve are -

* Prakriti - The most subtle potentiality that is behind whatever is created in the physical universe, also called "primordial Matter". It is also a state of equilibrium amongst the Three Gunas.

* Mahat - first product of evolution from Prakriti, pure potentiality. Mahat is also considered to be the principle responsible for the rise of buddhi or intelligence in living beings.

* Ahamkara or ego-sense - second product of evolution. It is responsible for the self-sense in living beings. It is also one's identification with the outer world and its content.

* "Panch Tanmatras" are a simultaneous product from Mahat Tattva, along with the Ahamkara. They are the subtle form of Panch Mahabhutas which result from grossification or Panchikaran of the Tanmatras. Each of these Tanmatras are made of all three Gunas.

* Manas or "Antahkaran" evolves from the total sum of the sattva aspect of Panch Tanmatras or the "Ahamkara"

* Panch jnana indriyas or five sense organs - also evolves from the sattva aspect of Ahamkara.

* Pancha karma indriya or five organs of action - The organs of action are hands, legs, vocal apparatus, urino-genital organ and anus. They evolve from the rajas aspect of Ahamkara.

* Pancha mahabhuta or five great substances - ether, air, fire, water and earth. They evolve from the "tamas" aspect of the "Ahamkara". This is the revealed aspect of the physical universe.

The evolution of primal nature is also considered to be purposeful - Prakrti evolves for the spirit in bondage. The spirit who is always free is only a witness to the evolution, even though due to the absence of discriminate knowledge, he misidentifies himself with Purusha (body).

The evolution obeys causality relationships, with primal Nature itself being the material cause of all physical creation. The cause and effect theory of Sankhya is called Satkaarya-vaada (theory of existent causes), and holds that nothing can really be created from or destroyed into nothingness - all evolution is simply the transformation of primal Nature from one form to another.

The evolution of matter occurs when the relative strengths of the attributes change. The evolution ceases when the spirit realizes that it is distinct from primal Nature and thus cannot evolve. This destroys the purpose of evolution, thus stopping Prakrti from evolving for Purusha.

Sankhyan cosmology describes how life emerges in the universe; the relationship between Purusha and Prakriti is crucial to Patanjali's yoga system. The evolution of forms at the basis of Sankhya is quite remarkable. The strands of Sankhyan thought can be traced back to the Vedic speculation of creation. It is also frequently mentioned in the Mahabharata and Yogavasishta.

Moksha
Like other major systems of Indian philosophy, Sankhya regards ignorance as the root cause of bondage and suffering (Samsara). According to Sankhya, the Purusha is eternal, pure consciousness. Due to ignorance, it identifies itself with the physical body and its constituents - Manas, Ahamkara and Mahat, which are products of Prakriti. Once it becomes free of this false identification and the material bonds, Moksha ensues. Other forms of Sankhya teach that Moksha is attained by one's own development of the higher faculties of discrimination achieved by meditation and other yogic practices as prescribed through the Hindu Vedas.

Views of what happens to the soul after liberation vary tremendously, as the Sankhya view is used by many different Hindu sects and is rarely practiced alone.