tat nau dgito atha pitṛdevatāyai svāhā dattvā pitṛgaṇebhyāś ca dehi

tat (that) nau (to us) dgito (having gone) atha (then) pitṛdevatāyai (to the lord of ancestors) svāhā (offering) dattvā (having given) pitṛgaṇebhyāś (to the groups of ancestors) ca (and) dehi (give)

Advaita Vedānta (Ādi Śaṅkarācārya): This verse from the Kaṭhopaniṣad is pivotal in understanding the non-dual nature of reality. Shankara interprets the offering to Pitṛ-devatā and Pitṛs as symbolic of the transcendence of worldly obligations, leading the seeker towards the ultimate reality, Brahman. The act of giving Svāhā signifies the surrender of egoistic tendencies and the recognition of the ultimate identity of Ātman and Brahman. As Shankara comments in his Brahmasutra Bhashya, the pursuit of understanding the nature of the Self is paramount, and verses like these guide the seeker in letting go of limited identifications, embracing the expansive, all-encompassing nature of the Self. This process of surrender and realization is central to the Advaitic path, emphasizing the direct experience of non-duality over ritualistic observances.

Vaiṣṇava tradition (Rāmānujācārya / Madhvācārya): The Vaiṣṇava tradition, particularly through the lens of Rāmānujācārya, views this verse as an affirmation of the devotional path, where the surrender to the divine (Īśvara) is paramount. The act of offering Svāhā to Pitṛ-devatā and Pitṛs is seen as an act of devotion, recognizing the divine presence in all beings, including ancestors. Rāmānujācārya, in his commentary on the Brahmasutras, emphasizes the importance of bhakti (devotion) as a means to realize the divine. This verse is interpreted as encouraging the devotee to recognize and honor the divine in every aspect of life, including the reverence for ancestors, which is a way of expressing devotion to the ultimate reality, Viṣṇu. The relationship between the jīva (individual soul) and Īśvara (the Lord) is one of dependence and devotion, where the jīva seeks to please Īśvara through such acts of reverence.

Neo-Vedānta (Swami Vivekānanda / S. Rādhākrishnan): Swami Vivekānanda and S. Radhakrishnan, key figures in Neo-Vedānta, interpret this verse in the context of universal applicability and practical wisdom. According to Vivekānanda, the act of giving Svāhā represents the universal principle of selflessness and the recognition of the interconnectedness of all beings. In his lectures on the Upanishads, Vivekānanda emphasizes that true strength lies not in selfishness but in selflessness, and that the greatest service to man is service to the divine in every being. Radhakrishnan, focusing on the philosophical aspects, sees this verse as highlighting the eternal and universal values of reverence, gratitude, and the pursuit of knowledge. He notes that the pursuit of understanding, as exemplified by the verse, leads to a deeper realization of the human condition and the ultimate reality, transcending limited understandings and fostering a sense of global citizenship and unity.

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