Understanding the Self’s Properties in Indian Philosophy

What is the self, really? Is it the body you inhabit, the thoughts you think, or something far more fundamental – an invisible essence that persists beyond birth and death? Few traditions have engaged this question with as much philosophical rigor as classical Indian philosophy. At the heart of this inquiry are the three properties that the Vedic tradition ascribes to the self: it is eternal, non-material, and identical with Brahman – the ultimate reality. But these claims are not universally accepted. Buddhist and Cārvāka thinkers mounted serious challenges to each of them, making the debate over the self’s properties one of the most sustained and intellectually rich in world philosophy.

The self in Indian philosophy: a foundational overview 🔗

The Sanskrit term Ātman refers to the innermost essence of a living being – not the ego, not the mind, not the body, but the pure, unchanging core beneath all of these. According to Encyclopaedia Britannica, Ātman is the universal self, identical with the eternal core of the personality, which either transmigrates into a new life after death or attains release (moksha) from the cycle of existence entirely. While the term originally appeared in the Vedas as a reflexive pronoun meaning “oneself,” it evolved through the Upanishads into one of the most consequential metaphysical concepts in Indian thought.

The Stanford Encyclopedia of Philosophy notes that the self is primarily conceived in the Upanishads as a pure subject of experience – detached from the objects of consciousness, enduring and changeless, independent of both mental and physical states. In the Bṛhadāraṇyaka Upaniṣad, the sage Yājñavalkya describes it plainly: “The sages call it the eternal self.” From this starting point, the orthodox schools developed three core properties of the self that together form a comprehensive metaphysical picture.

The three core properties of the self 🔗

The self is eternal 🔗

The first and perhaps most foundational claim is that the self has no beginning and no end. As summarized in classical Vedic sources, the three properties stated in Vedic scriptures are that the self is eternal, non-material, and identical with Brahman. The eternality of the self follows, according to the Advaita Vedānta philosopher Śaṅkara, from the nature of the self itself: since the self is not an effect – that is, it was not produced or caused by anything – it cannot have come into being, and therefore cannot cease to be. Whatever comes into being must also pass away; the self, being uncaused, is exempt from this logic.

This argument receives its most vivid expression in the Bhagavad Gītā, where Krishna urges Arjuna to understand the indestructible nature of the Ātman. As the Wikipedia article on Ātman explains, the Gītā teaches that the self neither kills nor can be killed, is imperceptible, inconceivable, and unchanging – it simply passes from one body to another as a person changes clothes. The self, in this view, is beyond the reach of weapons, fire, water, or wind. It is described as eternal, all-pervading, unchangeable, and immovable.

The Nyāya school of orthodox Hindu philosophy took this a step further by offering rational proofs for the self’s existence and continuity, rather than relying solely on scriptural testimony. Nyāya scholars argued that personal recollections of the form “I did this many years ago” implicitly presuppose a self that is substantial, continuing, and unchanged across time – an argument that anticipates later Western debates about personal identity.

The self is non-material 🔗

The second property is immateriality. The self, according to orthodox Indian philosophy, is fundamentally distinct from the body, the senses, and anything that belongs to the material world (prakṛti). It cannot be perceived through the senses or studied using empirical methods. As the philosophical overview at Horizon of Reason notes, Śaṅkara argues that the existence of an eternal, immaterial self distinct from the body is a necessary presupposition for the very intelligibility of liberation (moksha). If the self were material, the entire project of liberation, as described in the scriptures, would make no sense – a conclusion no Vedāntin could accept.

In Advaita Vedānta, the self is pure consciousness (cit), devoid of any material properties. It is self-luminous – it illuminates everything else but requires nothing external to illuminate itself. The Upanishadic description is unambiguous: the Ātman is beyond sound and form, without touch, taste, or perfume. It cannot be grasped by the senses because the senses are precisely what the self underlies and makes possible. As the ISKCON Educational Services explains, the real self is distinct from the temporary body, and material designations simply do not apply to this eternal soul. The body is likened to a vehicle and the soul to the driver – the vehicle can exist without motion, but motion cannot happen without the driver.

In the Sāṃkhya school, a similar but distinct account is offered. Here, the immaterial principle is called puruṣa (pure consciousness), which is eternally distinct from prakṛti (matter). Each individual puruṣa is distinct, eternal, and unchanging, and liberation consists in realizing the absolute separation between consciousness and matter – not their unity, as in Advaita, but their irreducible difference.

The self is identical with Brahman 🔗

The third property is the most philosophically radical: the individual self is ultimately not separate from Brahman, the absolute reality that underlies the entire universe. This identification is most fully developed in Advaita Vedānta. Britannica’s entry on Ātman notes that certain Hindu circles identified the Ātman with Brahman, holding that the self underlies all personal activity in the same way that Brahman underlies the workings of the universe as a whole. The famous Upanishadic declaration “Tat Tvam Asi” – “That Thou Art” – encapsulates this: the individual self is non-different from the infinite absolute.

Śaṅkara, the eighth-century founder of Advaita Vedānta, taught that the apparent difference between Ātman and Brahman is a product of avidyā (ignorance) and māyā (illusion). In reality, there is only one self – one undivided, self-luminous consciousness. As described in the academic review of Ātman published in the Journal of Natural and Ayurvedic Medicine, Śaṅkara held that Ātman is beyond the knower, the knowable, and knowledge itself; it is beyond space and time; and it appears to be many only because of ignorance, while in reality being single. The realization of this identity – that one’s true self is identical with the ground of all being – is moksha.

Not all Vedāntic schools agreed. Viśiṣṭādvaita, associated with Rāmānuja, held that individual selves are real but exist as modes or attributes of Brahman, who is identified with the personal God Viṣṇu. Dvaita Vedānta, founded by Madhva, went further, arguing that each individual self is eternally distinct from Brahman, and liberation consists in realizing one’s permanent, loving dependence on the divine – not dissolving into it. These intra-Vedāntic debates reflect just how consequential the question of the self’s identity with Brahman really was.

The heterodox challenge: Buddhism and the doctrine of no-self 🔗

If the orthodox schools are the thesis, Buddhism is the antithesis. The Buddhist doctrine of anattā (Pāli) or anātman (Sanskrit) directly challenges the Vedic conception of the self. According to Wikipedia’s article on Anattā, the concept of anattā is one of the most fundamental differences between mainstream Buddhism and mainstream Hinduism – Buddhism denying that any unchanging, permanent self exists, while Hinduism affirms the eternal Ātman as pure awareness or witness-consciousness.

For the Buddha, what we call the “self” is not a single, unified, permanent thing but rather a constantly changing collection of five aggregates (skandhas): form, sensation, perception, mental formations, and consciousness. As philosopher Matt Mackane explains, these five aggregates compose the individual – they are constantly changing and interdependent, and from a Buddhist standpoint, there is no enduring self behind this composition. There is personhood, but no permanent self to anchor it.

Crucially, the Buddhist challenge applies directly to Śaṅkara’s argument from eternality. Śaṅkara had argued that the self is eternal because it is uncaused. The Buddhist counter, as noted in the Horizon of Reason analysis, is that anything which is not caused does not exist at all – so the very premise of an uncaused self is, for the Buddhist, a proof not of its eternality but of its non-existence. This is a sharp logical reversal: what one tradition takes as evidence for the self, the other takes as evidence against it.

Buddhism does not, however, reject the immateriality of experience. The Wikipedia article on Anattā clarifies that the Buddha criticized both the eternalist view (positing an unchanging self as the basis of rebirth) and the annihilationist view (denying any continuity whatsoever). The Buddhist middle path insists on rebirth and moral responsibility without positing an eternal soul – a subtle and philosophically demanding position.

The Cārvāka rejection: the self as the body 🔗

The Cārvāka school – also known as Lokāyata – pushes the critique of the orthodox self to its most radical conclusion. Where Buddhism denies the permanent self but retains rebirth and ethical continuity, Cārvāka denies both the soul and any afterlife entirely. According to Encyclopaedia Britannica, the Cārvākas rejected the existence of a soul or self that survives death, dismissed karma and liberation, and accepted only direct sensory perception (pratyakṣa) as a valid source of knowledge.

Their position on the self is called Dehatmavāda – the doctrine that the self is identical with the body. As the Internet Encyclopedia of Philosophy explains, two sub-schools emerged within Cārvāka: one holding that no self or soul exists apart from the body at all; another holding that a soul can co-exist with the body while the body lives, but perishes entirely with it. What both versions agree on is that there is no other-worldly, immaterial, eternal soul. Consciousness arises from the right combination of material elements, and when the body disintegrates, consciousness ceases entirely.

Their argument is partly empirical: as the Cārvāka position is reconstructed from extant sources, they noted that when the body is nourished by food, consciousness is also nourished; when the body weakens, consciousness weakens. This tight correlation, they argued, supports the identification of consciousness with the body. As Britannica notes, the Cārvākas accepted the reality of consciousness but understood it as a byproduct of bodily matter – a phenomenon arising from the right combination of elements, not evidence of an immaterial soul.

This position directly attacks all three properties of the orthodox self. The self is not eternal – it ends when the body ends. It is not immaterial – it is a product of physical processes. And the question of its identity with Brahman does not even arise, since for the Cārvāka, Brahman is inferred and cannot be perceived by the senses, and whatever cannot be sensorily verified has no claim to reality.

Why this debate still matters 🔗

The debate over the self’s properties is not merely a historical artifact. It touches on questions that remain very much alive: Is consciousness reducible to the brain? Is there personal continuity across time – or even across a single lifetime? What grounds moral responsibility if the self is not permanent? As the Stanford Encyclopedia of Philosophy observes, the Hindu schools defend a non-reductionist view of persons: the continued existence of a person is a deep further fact, distinct from physical and psychological continuity. This stands in direct contrast to Buddhist and Cārvāka accounts, which reduce the person to bundles of physical or psycho-physical processes.

What makes the Indian debate particularly valuable is its breadth. The orthodox Vedāntic tradition, in its various sub-schools, gives us several distinct models of how the individual self relates to ultimate reality – full identity in Advaita, qualified identity in Viśiṣṭādvaita, and eternal distinction in Dvaita. Against these, Buddhism offers a middle path that rejects both eternal selfhood and sheer annihilationism. And Cārvāka provides what the Internet Encyclopedia of Philosophy describes as the most radical of all Indian philosophical systems – one that grounds reality entirely in the material and the perceptible. Together, these positions map out nearly every logically possible stance on the nature of the self, making this debate one of the richest in the history of human thought.

What do you think? If the self is truly eternal and non-material as the Upanishads claim, what would that mean for how we understand consciousness, suffering, and personal identity? And does the Cārvāka view – that the self is simply the living body, and nothing more – strike you as more consistent with how we actually experience ourselves in daily life?

References

1. https://www.britannica.com/topic/atman
2. https://plato.stanford.edu/entries/personhood-india/
3. https://horizonofreason.com/culture/self-in-indian-philosophy/
4. https://en.wikipedia.org/wiki/%C4%80tman_(Hinduism)
5. https://iskconeducationalservices.org/HoH/concepts/key-concepts/atman-the-self/
6. https://www.fabriziomusacchio.com/weekend_stories/told/2025/2025-01-02-atman/
7. https://medwinpublishers.com/JONAM/concept-of-atman-self-in-indian-philosophy-a-review.pdf
8. https://en.wikipedia.org/wiki/Anatt%C4%81
9. https://mattmackane.medium.com/atman-vs-anatman-self-or-no-self-190caf9e277f
10. https://www.britannica.com/topic/Charvaka
11. https://iep.utm.edu/indmat/
12. https://www.mncbmonline.co.in/attendence/classnotes/files/1695568159.pdf
13. https://mahavidya.ca/2008/06/22/carvarka-materialist-philosophy/