tat puruṣāya dṛṣṭaye

tat (that) puruṣāya (for the person) dṛṣṭaye (for the sake of seeing)

Advaita Vedānta (Ādi Śaṅkarācārya): In the Praśnopaniṣad, the verse 'tatpuruṣāya dṛṣṭaye' underscores the non-dual nature of reality, pointing to the ultimate vision of the Self, which is beyond duality. Shankara, in his commentary on the Taittiriya Upanishad, emphasizes that the realization of the identity of the individual self (ātman) with the universal Self (Brahman) is the culmination of all spiritual pursuits. This verse, by invoking 'That Person,' refers to the vision of the absolute, unconditioned reality that is the essence of all existence. According to Shankara, the comprehension of this verse leads to the direct experience of Brahman, dissolving the distinctions between the individual and the universal, thereby establishing the non-dual (advaita) nature of reality. This understanding is crucial for liberating the self from the cycle of birth and death. Shankara's reasoning, as seen in his commentaries, consistently directs the seeker towards this ultimate goal of realizing the self as not different from Brahman.

Vaiṣṇava tradition (Rāmānujācārya / Madhvācārya): The Vaiṣṇava tradition interprets 'tatpuruṣāya dṛṣṭaye' as a call to devotion and service to the Supreme Lord. Rāmānujācārya, in his commentary on the Brahma Sutras, discusses the loving devotion (bhakti) that arises from recognizing the Lord as the inner Self of all beings. This verse, for Rāmānuja, signifies the ultimate vision of the Lord in His essence, which is the goal of all religious practices. The jīva, or individual self, strives to realize its intrinsic relationship with Īśvara, the Supreme Controller, and this verse encapsulates that striving. Madhvācārya, on the other hand, would emphasize the distinction between the jīva and Īśvara, yet both agree that the verse points to a profound spiritual experience where the devotee attains a direct vision of the Lord. This experience is rooted in surrender, devotion, and the recognition of the Lord's graciousness in revealing Himself to the devotee.

Neo-Vedānta (Swami Vivekānanda / S. Rādhākrishnan): Swami Vivekānanda and S. Radhakrishnan, key figures in modern Vedānta, interpret 'tatpuruṣāya dṛṣṭaye' in the context of universal harmony and the practical application of spiritual principles in everyday life. Vivekānanda, in his lectures and writings, often spoke of the unity of all existence and the potential for every individual to realize this unity. He would see this verse as an inspiration for the human quest for the ultimate, encouraging individuals to strive for a higher state of consciousness where distinctions fade, and the universal consciousness is realized. Radhakrishnan, with his philosophical bent, would approach this verse as a pointer to the integral nature of reality, where the individual (jīva) and the universal (Brahman) are interconnected. For him, this verse underscores the importance of integrating spiritual insights into daily life, fostering a sense of global citizenship and universal brotherhood, thereby making the world a better place through the realization of the oneness of all existence.

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