Ignorance-Knowledge: 24

Sadasadvilakṣaṇa: The world cannot be called sat (real), for it is not eternal, immutable, and self-established like Brahman. When ultimate knowledge dawns, its falsity becomes apparent. Yet the world cannot be called asat (unreal) either, for we directly experience it in our worldly life and establish practical relationships with it. It is not entirely illusory like a barren woman's son or a rabbit's horn. Nor can it be both sat and asat simultaneously, for these contradictory concepts cannot coexist in the same entity. Therefore, the world can be called neither sat nor asat—it is distinct from both reality and unreality.

Anirvacanīya: Since the world is neither sat nor asat, and is also distinct from both, its true nature cannot be described by any definitive term. It is 'indescribable' (anirvacanīya). This means that the world cannot be fully explained by our intellect or language—it is a creation of māyā, and māyā itself is indescribable.

Māyā and the Falsity of Waking and Dream States: Advaita Vedanta describes māyā as an indescribable power that makes Brahman appear as the world. This very māyā is the cause of all diversity and difference in the world. Under māyā's influence, we see Brahman as the world and consider ourselves individual souls.

Both the waking state (practical truth) and the dream state (apparent truth) belong to the realm of this indescribable māyā.

The Waking State: Our daily experience, which we consider real, is the waking state. In Advaita Vedanta, this state is called practical truth (vyāvahārika satya). In this state, we establish relationships with various objects, persons, and events. The causal relationships and moral laws of this world are all true at this practical level.

The Dream State: Dreams seen during sleep constitute apparent truth (prātibhāsika satya). The world we see in dreams is not as solid as the waking world and proves false when we wake up. Though dream objects seem as real as worldly objects, they have no ultimate existence.

According to Advaita Vedanta, both waking and dream states are considered false or unreal from the ultimate standpoint. Though the waking state is more solid and coherent than the dream state, from the ultimate perspective both are creations of māyā, and when Brahman-knowledge dawns, both appear false. Just as upon waking from a dream, the dream world proves false, so too when Brahman-knowledge is attained, the waking world is realized to be māyic and false. Only Brahman is the ultimate truth.

In Advaita Vedanta, these three levels of reality are classified as Satya Traya. These levels are: Ultimate Truth (Pāramārthika Satya), which is the absolute truth or Ultimate Reality—the nature of non-dual Brahman. This is unobstructed, self-existent, and free from duality; it relates to the turīya (fourth) state of consciousness. The second level is Practical Truth (Vyāvahārika Satya) or Relative Reality, which encompasses worldly experience created by māyā and where the law of cause and effect operates. This appears true until Brahman-knowledge is attained and corresponds to the waking (jāgrat) state of experience. The third level is Apparent Truth (Prātibhāsika Satya) or Illusory Reality, which consists of delusions that appear only in the mental realm and are negated by waking knowledge. The dream (svapna) state belongs to this apparent level.

The Nature of Turīya Consciousness—Freedom from the Seed of Ignorance: Waking (vaiśvānara), dreaming (taijasa), and deep sleep (prājña)—these three states are merely different conditioned manifestations of human consciousness. These states indicate various levels of worldly experience where mind and senses operate in different forms. In the waking state we experience the gross world through the senses, in dreams the subtle mental world is active, and in deep sleep all ceases with only the seed of ignorance remaining dormant.

Beyond these three states lies the fourth state called turīya. This is consciousness in its original, fundamental, and unconditioned form. Turīya is described as identical with Brahman, which is the ultimate absolute truth. This is a state where worldly bondage, the sense of duality, and the seed of ignorance are completely burned away. Turīya is not a field of particular experience, but rather the background of all experience—the infinite, unbroken state of consciousness. This is the ultimate destination of Self-knowledge or mokṣa.

The Negative Definition of Turīya (Neti, Neti): The seventh verse of the Māṇḍūkya Upaniṣad describes turīya primarily through negative terms, reflecting the 'neti, neti' (not this, not that) method. This method is a crucial indicator in spiritual philosophy, showing that turīya cannot be perceived as knowledge or experience through the limited concepts of mind or intellect. Turīya cannot be defined by any particular quality, state, or object. It is not sense-perceptible, not conceivable by mind, nor determinable by intellect. It is neither gross nor subtle, nor even subject to causation. It transcends all known characteristics.

The 'neti, neti' method points to turīya's nature negatively because describing its true nature positively might lead to misinterpretation through our limited understanding. This process frees our minds from all conventional concepts and attributes, leading toward that non-dual truth which exists beyond all limitations. It is a state of realization, not a particular form of knowledge.

The Upaniṣad declares that turīya is:
Not conscious of internal events (not taijasa), nor conscious of external events (not vaiśvānara).
Not conscious of anything intermediate between waking and dreaming states.
Neither a mass of consciousness (not prājña) nor inert (not aprājña).

These characteristics of turīya—namely, adṛṣṭam (imperceptible to any sense), avyavahāryam (beyond any practical transaction), agrāhyam (ungraspable), ananumeyam (beyond inference), acintyam (beyond thought), and avyapadeśyam (indescribable through language)—establish that turīya is a purely negative concept. This means turīya cannot be defined by any positive qualities or particular forms. Rather, it is understood as a state that transcends all possible experiences, perceptions, and fields of knowledge.

This negative definition is extremely important because it places turīya outside ordinary worldly or mental states. It is not a sense-object, not inferable by mind, not determinable by intellect, and not describable through language. Turīya is such a state that is completely different from and beyond the three familiar states of our consciousness—waking (jāgaraṇa), dreaming (svapnāvasthā), and deep sleep (suṣupti). It is supreme consciousness, free from any duality or division. This state is not limited by any manifest form or particular quality, but is an infinite, indestructible, and unchanging truth free from all limitations.

These characteristics of turīya establish it as a supreme goal of spiritual practice, where all forms of worldly experience and subjective concepts dissolve, leaving only the experience of pure consciousness.

The fundamental difference between suṣupti and turīya lies in 'bīja nidrā varjana' (the absence of seed-sleep). This distinction is extremely important in Upaniṣadic philosophy for understanding different states of the soul. Suṣupti is considered the third pāda of the soul, called 'prājña'. This corresponds to the third measure 'm' of Oṃkāra, indicating the state of deep sleep.

Characteristics of Suṣupti:

Unified Experience: In the suṣupti state, all worldly experiences and knowledge become unified. The individual then gains no knowledge of separate objects or subjects; rather, all experience remains dissolved in an undivided form.

Enjoyment of Bliss: In this state, the jīva enjoys pure bliss (ānandamayaḥ). This is a spontaneous and unsupported joy beyond sensory pleasure. Though this is a blissful state, ignorance about the true cause of this blissful experience remains.

Causal Body (Kāraṇa Śarīra): The suṣupti state is called the causal body of the soul. The causal body is the seed-state of all karmic fruits and future worldly experiences. It is such a subtle state where dormant impressions (latent impressions) and karmic fruits lie hidden, from which later dreams and waking states arise. For this reason it is called the 'seed-state'. In this state, the jīva remains ignorant of its true Self-nature, which is known as 'bīja nidrā'. This ignorance is the root cause of all suffering and bondage.

Characteristics of Turīya:

Turīya is the fourth state of the soul, beyond these three states—suṣupti, dream, and waking. It is the state of supreme consciousness.

Absence of Seed-Sleep: In the turīya state, 'bīja nidrā'—meaning the ignorance hidden within the causal body—is completely absent. This is complete freedom from ignorance and realization of one's Self-nature. In the turīya state, no form of duality remains; seer, seen, and seeing become one.

Nirvikalpa Samādhi: The turīya state is often compared with nirvikalpa samādhi, which is the deepest stage of yoga philosophy and spiritual practice. In this state, the mind completely dissolves, meaning all external and internal thoughts, feelings, and ego vanish. The practitioner then remains only as their soul-essence or pure consciousness.

Reaching this level requires deep meditation and concentration. In nirvikalpa samādhi, there are no alternatives or dualities; seer, seeing, and seen become unified. This is a state where all worldly bonds are severed and the individual experiences supreme peace. This state is often seen as the ultimate expression of the feeling 'I am Brahman' or 'Soham', where the individual realizes their small self as identical with the cosmic Supreme Self. This is considered an important step toward attaining mokṣa or nirvāṇa.

Freedom from Bondage: In this state, the jīva becomes free from all worldly bondage and realizes supreme peace and bliss, which is even higher than the bliss of suṣupti. This is not a state of experience, but experience-being itself.

Therefore, though the jīva enjoys bliss in the suṣupti state, the seed of ignorance (bīja nidrā) remains, which causes future rebirth and karmic consequences. In contrast, in the turīya state, this seed-sleep is completely absent, whereby the jīva becomes permanently free from ignorance and bondage and is established in its true and ultimate Self-nature. This is the fundamental difference between suṣupti and turīya.

In Gauḍapāda Kārikā, verse 13, the subtle yet fundamental difference between suṣupti (prājña) and turīya is clarified:

In both states, knowledge of duality is absent. But prājña remains associated with bīja nidrā (seed-sleep) or the limiting adjunct of causation. This seed is precisely avidyā (ignorance) that remains in dormant state. Due to the presence of this seed-sleep, the jīva must return from the prājña state to waking or dreaming states, and the world of multiplicity manifests again.