Nā ayam ātmā balahīnasya vaśe vaśyaṃ ca eva āgrahītum

Nā (not) ayam (this) ātmā (Self) balahīnasya (of the weak) vaśe (under control) / vaśyaṃ (to be controlled) ca (and) eva (indeed) āgrahītum (to be seized)

Advaita Vedānta (Ādi Śaṅkarācārya): This verse underscores the significance of a strong will in realizing the Self. Shankara, in his commentary on the Muṇḍakopaniṣad, emphasizes that the ātman is not a object to be grasped by the weak-willed. The phrase 'Nāyama ātmā balahīnasya vaśe' suggests that the Self is beyond the control of one who lacks inner strength. Shankara's reasoning on this verse aligns with his non-dual reading of the Upaniṣads, where he posits that the ultimate reality, Brahman, is identical with the individual self, ātman. The controlled mind, as indicated by 'vaśyaṃ ca eva āgrahītum', is the key to realizing this identity. Through self-control and discrimination, one can transcend the limitations of the ego and realize the unity of Brahman and ātman. This verse, therefore, points to the importance of self-discipline in the pursuit of Self-knowledge, as emphasized by Shankara's commentary on the Bhagavad Gītā and the Brahma Sūtras.

Vaiṣṇava tradition (Rāmānujācārya / Madhvācārya): In the Vaiṣṇava tradition, this verse is understood as highlighting the relationship between the jīva (individual self) and Īśvara (the Lord). Rāmānujācārya, in his commentary on the Upaniṣads, interprets 'Nāyama ātmā balahīnasya vaśe' as indicating that the Self cannot be realized by one who lacks devotion to the Lord. The 'weak-willed' individual is one who is devoid of bhakti, or loving devotion. In contrast, the 'controlled' mind, as mentioned in 'vaśyaṃ ca eva āgrahītum', refers to the mind that is disciplined through devotion and self-surrender to the Lord. Madhvācārya, on the other hand, emphasizes the importance of prapatti, or self-surrender, in realizing the Self. This verse, therefore, underscores the importance of devotion and self-surrender in the pursuit of spiritual growth, as emphasized by the Vaiṣṇava tradition's emphasis on the relationship between the jīva and Īśvara.

Neo-Vedānta (Swami Vivekānanda / S. Rādhākrishnan): This verse offers a powerful message for contemporary life, emphasizing the importance of self-discipline and inner strength in achieving personal growth and transformation. Swami Vivekānanda, in his lectures on the Upaniṣads, highlights the significance of 'Nāyama ātmā balahīnasya vaśe' as a call to develop a strong and controlled mind. He argues that the 'weak-willed' individual is one who is governed by external circumstances, whereas the 'controlled' mind is one that is capable of self-directed action. S. Radhakrishnan, in his writings on Indian philosophy, emphasizes the universal applicability of this verse, arguing that the pursuit of Self-knowledge requires a disciplined and integrated personality. This verse, therefore, has practical implications for contemporary life, encouraging individuals to cultivate inner strength, self-awareness, and self-discipline in order to realize their full potential, as emphasized by Vivekananda's emphasis on the importance of self-reliance and Radhakrishnan's emphasis on the need for a holistic approach to personal growth.

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