sa eṣa tu mahātejasāḥ pavitraḥ satya-vāk yaśaḥ

saḥ (he) eṣaḥ (this one) tu (indeed) mahātejasāḥ (of great splendor) pavitraḥ (pure) satya-vāk (truthful speech) yaśaḥ (glory)

Advaita Vedānta (Ādi Śaṅkarācārya): This verse, 'sa eṣa tu mahātejasāḥ pavitraḥ satyavāk yaśaḥ', underscores the non-dual nature of reality by highlighting the attributes of the ultimate reality, Brahman. Shankara, in his commentary on the Taittiriya Upanishad, emphasizes that the true Self (Ātman) is characterized by its purity, truthfulness, and splendor. This verse, by attributing these qualities to the subject, points towards the identity of the individual self (jīva) with the universal Self (Brahman). Shankara's reasoning, as seen in his Bhāṣya on the Brahma Sūtras, is that if the individual self can recognize and strive for these attributes, it indicates an intrinsic, unchanging nature that reflects the eternal, unblemished essence of Brahman. Thus, this verse supports the Advaita Vedānta perspective by suggesting that the pursuit of truth, purity, and the realization of one's true nature are fundamental to understanding the Brahman-ātman identity.

Vaiṣṇava tradition (Rāmānujācārya / Madhvācārya): The Vaiṣṇava tradition interprets this verse in the context of the relationship between the individual soul (jīva) and the Supreme Lord (Īśvara). Rāmānujācārya, in his Śrī Bhāṣya, discusses the concept of prapatti or surrender to the Lord, where the jīva, recognizing its limitations, surrenders to Īśvara, who embodies all perfection, including great splendor, purity, truthfulness, and fame. This surrender is motivated by the jīva's innate desire for liberation and its recognition of Īśvara's gracious and benevolent nature. Madhvācārya, from a Dvaita perspective, would emphasize the real distinction between the jīva and Īśvara, yet both would agree that the attributes mentioned in this verse are ideally embodied in the Lord, serving as a model for the jīva's spiritual aspiration and devotion.

Neo-Vedānta (Swami Vivekānanda / S. Rādhākrishnan): Swami Vivekānanda, in his lectures and writings, often emphasized the practical application of Vedāntic principles in everyday life. This verse, with its description of great splendor, purity, truth-speaking, and fame, can be seen as an inspiration for human conduct and self-cultivation. Vivekānanda would likely interpret these qualities as the ideal towards which every individual should strive, reflecting the inherent potential within each person to manifest these divine attributes. S. Rādhākrishnan, in his philosophical works, such as 'The Principle Upaniṣads', highlighted the universal and eternal nature of these qualities, arguing that they represent the essence of human excellence and the basis for a harmonious and just society. Both thinkers would encourage individuals to embody these virtues, not merely as abstract ideals, but as living, breathing principles that guide personal growth, interpersonal relationships, and societal development, thereby fostering a world that reflects the splendor, purity, and truth spoken of in the verse.

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