Na eṣā tarkēṇa nocyate yāyā śrutasya artham aśocati

Eṣā (this) śrutasya (Veda) artham (meaning) yāyā (which) aśocati (does not grieve) tarkēṇa (by reasoning) na (not) nocyate (is not explained)

Advaita Vedānta (Ādi Śaṅkarācārya): This verse underscores the limitations of logic in comprehending the ultimate reality. Shankara's commentary on the Muṇḍakopaniṣad emphasizes that the truth of Brahman-ātman identity cannot be grasped through mere argumentation or intellectual reasoning. He posits that the knowledge of Brahman is a direct experience, attainable only through the removal of avidyā (ignorance) and the cultivation of Self-inquiry. This verse, in essence, cautions against the futility of relying solely on tarka (logical reasoning) to understand the profound import of the Upaniṣads. Shankara's reasoning highlights the distinction between intellectual understanding and direct experience, underscoring that the ultimate truth of non-duality (advaita) transcends the bounds of dialectical reasoning, pointing instead to the identity of the individual self (ātman) with the universal reality (Brahman). The verse thus serves as a foundation for the Advaita tradition's emphasis on the necessity of spiritual practice and the direct experience of reality beyond the confines of logical argumentation.

Vaiṣṇava tradition (Rāmānujācārya / Madhvācārya): This verse is interpreted within the Vaiṣṇava tradition as highlighting the importance of śruti (revealed scriptures) in understanding the ultimate reality. Rāmānujācārya, in his commentary on the Brahma Sūtras, emphasizes the role of śabdapramāṇa (the authority of the Vedic scriptures) in understanding the relationship between the individual self (jīva) and the Supreme Lord (Īśvara). The inability to grasp the truth through mere reasoning (tarka) underscores the necessity of surrender to the Lord and adherence to the scriptures. Madhvācārya, from a Dvaita perspective, further underscores the distinction between the individual selves and the Supreme, emphasizing that the knowledge of this distinction can only be authentically derived from the scriptures, not through human reasoning alone. The verse, in this context, emphasizes devotion and the pursuit of knowledge through reverence for the revealed truth as the path to understanding the ultimate reality and one's place within it.

Neo-Vedānta (Swami Vivekānanda / S. Rādhākrishnan): This verse is seen as a call to look beyond the limitations of rational inquiry in understanding the deeper dimensions of human existence. Swami Vivekānanda, in his lectures on Jnāna Yoga, emphasizes the importance of experience over mere intellectual understanding. He argues that the knowledge of the ultimate reality, akin to the Brahman-ātman identity in Advaita Vedānta, cannot be achieved through argumentation but through direct perception and realization. Sarvepalli Radhakrishnan extends this line of thought, highlighting the contemporary relevance of this verse in pointing to the limits of scientific and philosophical inquiry in addressing the fundamental questions of human existence. He advocates for a synthesis of rational inquiry with spiritual insight, suggesting that the pursuit of knowledge must be complemented by the cultivation of the inner life to grasp the full depth of human experience and the nature of reality. This synthesis reflects a modern interpretation that seeks to apply the timeless wisdom of the Upaniṣads to the challenges and inquiries of contemporary life.

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