Hindu philosophy is not built on a single book or one founding figure. It rests on a vast and layered body of scripture, accumulated over thousands of years, shaped by revelation, memory, and evolving human understanding. At the heart of this scriptural tradition lies a fundamental distinction – one that determines which texts are considered eternally authoritative and which are seen as adaptable to changing times. That distinction is between Śruti and Smṛti, two categories that together form the foundation of Hindu philosophical thought.
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The two pillars of Hindu scripture
All sacred literature in Hinduism is broadly divided into two categories: Śruti and Smṛti. Understanding what each of these means – and why the distinction matters – is essential to grasping how Hindu philosophy is structured and how it has evolved.
Śruti, derived from the Sanskrit root meaning “that which is heard,” refers to the most authoritative body of ancient Hindu texts. These are understood to be of divine origin – not composed by any human author, but revealed to ancient sages (Rishis) through direct spiritual experience. Because of this, they are described as apauruṣeya, meaning “not of human origin.” Śruti is unchangeable. Its texts are fixed, preserved carefully across generations through oral transmission, and cannot be revised or reinterpreted in a way that alters their core content.
Smṛti, by contrast, comes from the Sanskrit root meaning “that which is remembered.” These texts are attributed to named human authors – sages and scholars who drew upon the eternal truths of Śruti and expressed them in forms suited to their time and society. Smṛti literature is therefore considered secondary to Śruti in authority, but it is crucial for practical application – codifying the moral, legal, and social guidelines for everyday life. Crucially, Smṛti is adaptive: it has been freely revised, rewritten, and reinterpreted across different historical periods.
The relationship between the two is hierarchical but complementary. In some Smṛti texts themselves, readers are reminded that in any conflict of doctrine between the two, Śruti will always overrule Smṛti. This hierarchy is not merely traditional – it is a formal epistemological principle embedded within the classical Hindu philosophical framework.
Śruti: the eternal, unchangeable revelation
The Śruti corpus is made up of four major components: the four Vedas, the Brāhmaṇas, the Āraṇyakas, and the Upanishads. Each layer serves a distinct philosophical and ritual purpose.
The four Vedas
The Vedas are the oldest layer of Śruti, and among the oldest surviving religious texts in any language. Śruti primarily comprises the Vedic corpus, which includes four main divisions: the Rigveda – a collection of hymns dedicated to various deities; the Yajurveda – a compilation of sacrificial formulas and rituals; the Sāmaveda – melodic chants primarily used in ceremonial contexts; and the Atharvaveda – hymns dealing with everyday concerns such as health, protection, and social life. Together, they reflect a vision of a universe sustained through cosmic order (ṛta) and maintained through proper ritual and ethical conduct.
Each Veda is further divided into four types of texts: Saṃhitās (hymns and mantras), Brāhmaṇas (prose explanations of ritual), Āraṇyakas (forest treatises on meditation and symbolic interpretation), and Upanishads (philosophical discourses on ultimate reality). These texts are considered the basis of Hindu thought, rituals, and early Indian society, and are believed to have been composed during the Vedic age, roughly between 1500-500 BCE.
The Upanishads: philosophy at its deepest
While all of Śruti carries authority, it is the Upanishads that carry the greatest philosophical weight. As scholar Patrick Olivelle has noted, even though theoretically the whole Vedic corpus is accepted as revealed truth, it is the Upanishads that have continued to influence the life and thought of the various religious traditions we call Hindu.
The Upanishads, dating largely from the eighth to the sixth centuries BCE, are the “wisdom literature” of the Vedas. Most take the form of dialogues between teachers and students, moving away from the external rituals of earlier Vedic texts toward questions of inner reality: What is the self? What is the nature of the universe? What is the source of all existence?
Their central philosophical insight is the relationship between Ātman (the individual self or soul) and Brahman (the ultimate, universal reality). The word Upanishad itself means “sitting near,” referring to the intimate teacher-student setting in which these profound truths were imparted. The most foundational of their teachings is expressed in the great Upanishadic declarations: Ahaṃ Brahmāsmi – “I am Brahman” – from the Bṛhadāraṇyaka Upanishad, and Tat Tvam Asi – “That art Thou” – from the Chāndogya Upanishad. Both declarations point to the same truth: the individual soul and the ultimate reality are, at their deepest level, identical.
The Upanishads form one of the three main sources for all schools of Vedānta, together with the Bhagavad Gītā and the Brahma Sūtras. Their teachings have spawned multiple schools of Hindu philosophy – most notably Advaita Vedānta (non-dualism), Viśiṣṭādvaita (qualified non-dualism), and Dvaita (dualism) – each interpreting the Upanishadic texts in different ways, reflecting the remarkable philosophical richness embedded within Śruti.
Smṛti: the remembered tradition
If Śruti provides the eternal spiritual framework, Smṛti provides the practical expression of that framework across different times and cultures. Smṛti literature elaborates, interprets, and codifies Vedic thought but, being derivative, is considered less authoritative than the Vedic Śruti. It includes a vast range of texts: the two great epics (the Mahābhārata and the Rāmāyaṇa), the Purāṇas, the Dharmaśāstras (legal and ethical treatises), and various philosophical commentaries.
One key feature of Smṛti is its openness to revision. While Śruti remains eternal and final in authority, Smṛti is open to revision and interpretation. This is precisely what has allowed Hindu philosophy to remain a living tradition – adapting its ethical and social frameworks to new historical contexts without abandoning its transcendent spiritual core.
All Smṛti texts are regarded as ultimately rooted in or inspired by Śruti. Their authority is therefore derivative – valid when consistent with Śruti, and questionable when they conflict with it. This is not a weakness of the tradition but a design feature: it ensures that human-authored texts remain accountable to a higher standard of revealed truth.
The Bhagavad Gītā: Smṛti with the authority of Śruti
The most celebrated of all Smṛti texts is the Bhagavad Gītā, embedded within the Mahābhārata. Composed as a dialogue between the warrior prince Arjuna and his charioteer Krishna on the eve of the great battle of Kurukṣetra, the Gītā addresses one of the most enduring questions in philosophy: how should a human being act in the face of moral conflict?
The Gītā is a synthesis of various strands of Indian religious thought, including the Vedic concept of dharma (duty, rightful action), Sāṅkhya-based yoga and jñāna (knowledge), and bhakti (devotion). While formally classified as Smṛti – because it forms part of the Mahābhārata, a human-authored epic – its philosophical stature has earned it a position alongside the Upanishads in Hindu tradition.
Adi Shankarāchārya himself described the Gītā as “the very essence of all Vedas” in his commentary on the text. All major Vedānta scholars – including Rāmānuja and Madhvāchārya – wrote commentaries on it. The Gītā holds a unique pan-Hindu influence: its relative brevity of around seven hundred verses makes it easy to study as a stand-alone devotional text, and it is nearly mandatory for leading Vedāntic scholars to comment on it.
The Gītā discusses foundational philosophical concepts such as ātman (the soul), Brahman (the Supreme Reality), and saṃsāra (reincarnation), and describes the different paths of liberation – principally karma (action), jñāna (knowledge), and bhakti (devotion). This synthesis is precisely what has made it accessible to ordinary believers and rigorous enough for philosophers.
Why the Śruti-Smṛti distinction matters
The division of Hindu scripture into Śruti and Smṛti is not merely an academic classification. It reflects a deeply considered epistemological position: that some truths are eternal and transcend human authorship, while the application of those truths to daily life is always context-dependent and open to reinterpretation.
Traditional Hindu law and practice rely on a fourfold hierarchy of sources: Śruti, Smṛti, custom (ācāra), and conscience (ātma tuṣṭi). This framework ensures a balance between divine command, human reasoning, and social realities. The result is a philosophical tradition that is simultaneously anchored in unchangeable revelation and flexible enough to evolve across millennia.
This interplay is visible throughout the history of Hindu thought. The concept of dharma, for instance, arises from Śruti but is interpreted and reapplied through Smṛti in response to changing social conditions. Legal texts like the Manusmṛti have been revised and contested over time, while the Vedas and Upanishads have remained the stable bedrock against which all new interpretations are measured. Though Śruti is considered to be the more authoritative, in practice the Smṛti texts are more influential in modern Hinduism – a testament to how well Smṛti has succeeded in translating eternal truths into lived experience.
What emerges from all of this is not a static, rigid religious system, but a dynamic philosophical tradition – one that has maintained its spiritual depth across thousands of years precisely because it built into itself a mechanism for change: the Smṛti that can be rewritten, reread, and reimagined, always in the light of the Śruti that endures.
What do you think? If a society’s moral and legal codes must periodically be revised to remain just, does that revision strengthen or weaken the philosophical tradition behind them? And given that the Bhagavad Gītā began as a Smṛti text yet achieved the authority of Śruti in practice, what does that tell us about how communities – across cultures and centuries – decide which texts they treat as sacred?
References
- https://www.britannica.com/topic/Shruti
- https://www.britannica.com/topic/Smriti
- https://www.gktoday.in/shruti-and-smriti/
- https://dharmawiki.org/index.php/Shruti_(%E0%A4%B6%E0%A5%8D%E0%A4%B0%E0%A5%81%E0%A4%A4%E0%A4%BF%E0%A4%83)
- https://testbook.com/ias-preparation/vedic-literature
- https://en.wikipedia.org/wiki/%C5%9Aruti
- https://pluralism.org/brahman-and-atman-that-art-thou
- https://www.mohan-ananda.com/2025/04/05/the-upanishads/
- https://en.wikipedia.org/wiki/Upanishads
- https://en.wikipedia.org/wiki/Sm%E1%B9%9Bti
- https://www.britannica.com/topic/Bhagavad-Gita
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- https://iskconeducationalservices.org/HoH/further-information-and-teaching-resources-secondary/fact-sheets/the-bhagavad-gita/
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