tasyā - yoṣā - yajamānasyā - sarva - kāmo - mṛgyaḥ - śāstra - vidhānena

tasyā (of that) yoṣā (bride) yajamānasyā (of the sacrificer) sarva - kāmo (all desire) mṛgyaḥ (to be sought) śāstra (scripture) vidhānena (according to the prescription)

Advaita Vedānta (Ādi Śaṅkarācārya): In the Kaṭhopaniṣad 43, the verse highlights the significance of the yajamāna's wife representing his entire desire. Shankara's commentary on this verse emphasizes the non-dual reading, where the ultimate reality, Brahman, is the essence of all desires. The search for the wife, or the fulfillment of desires, is an allegory for the search for the Self. According to Shankara, the wife represents the individual's prāṇa or vital force, which is an aspect of the ultimate reality. The śāstra's rules serve as a guide for the seeker to understand the true nature of the Self. This verse points to the identity of Brahman and ātman, where the individual's desires are ultimately a reflection of the universal consciousness. Shankara's reasoning on this verse is closely related to his concept of 'anātman,' where the individual self is an illusion, and the ultimate reality is the unchanging, all-pervading Brahman.

Vaiṣṇava tradition (Rāmānujācārya / Madhvācārya): The Vaiṣṇava tradition interprets the Kaṭhopaniṣad 43 as a representation of the jīva's (individual soul's) search for Īśvara (the Lord). The wife of the yajamāna symbolizes the jīva's inherent longing for union with the divine. Rāmānujācārya's visiṣṭādvaita philosophy emphasizes the distinction between the jīva and Īśvara, while also highlighting their interconnectedness. In this context, the verse illustrates the jīva's dependence on the śāstra for guidance in achieving its ultimate goal of devotional service to Īśvara. Madhvācārya's dvaita philosophy, on the other hand, views the verse as a demonstration of the jīva's inherent duality with Īśvara, emphasizing the need for the jīva to follow the śāstra's rules to attain spiritual liberation. Both Rāmānujācārya and Madhvācārya's commentaries underscore the significance of devotion and surrender in the pursuit of spiritual growth.

Neo-Vedānta (Swami Vivekānanda / S. Rādhākrishnan): Swami Vivekānanda's interpretation of the Kaṭhopaniṣad 43 emphasizes the universal and practical application of this verse. According to Vivekānanda, the search for the wife represents the universal human quest for fulfillment and meaning. The śāstra's rules serve as a guide for individuals to navigate their desires and aspirations, ultimately leading to self-realization. In his lecture 'The Powers of the Mind,' Vivekānanda cites the Upaniṣads as a source of inspiration for spiritual growth, highlighting the importance of self-inquiry and introspection. S. Rādhākrishnan's writings also emphasize the significance of this verse in understanding the human condition, where the individual's desires and aspirations are ultimately rooted in their deeper longing for connection and meaning. This verse encourages individuals to re-examine their priorities and values, seeking a more profound sense of purpose and fulfillment in life. By applying the principles of the śāstra, individuals can cultivate a more harmonious and balanced approach to life, ultimately leading to greater happiness and self-actualization.

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