yo na draṣṭum yaś caiva na śrauṭum na manasā naraṇāṃ paśyati drutam

yaḥ (who) naraṇām (of men) manasā (by mind) drutam (swiftly) paśyati (sees) na (not) +yo (who) na (not) draṣṭum (to see) yaś (which) ca (and) eva (indeed) na (not) śrauṭum (to hear)

Advaita Vedānta (Ādi Śaṅkarācārya): This verse is crucial in understanding the non-dual nature of reality as it points to the imperceptibility of the divine knowledge to those who are unable to see, hear, or perceive with their minds. Shankara, in his commentary on the Bhagavad Gītā, emphasizes that the knowledge of the self (ātman) is not something that can be acquired through sensory perception or mental constructs. Instead, it is a direct realization that arises from the negation of all limitations and dualities. The phrase 'nādraṣṭum' (neither sees) highlights the futility of seeking the ultimate reality through sensory means, while 'na śrauṇ' (nor hears) underscores the limitations of scriptural knowledge alone. Shankara's interpretation of this verse underscores the importance of interior reflection and the stilling of the mind to realize the brahman-ātman identity, where the individual self is ultimately one with the universal consciousness.

Vaiṣṇava tradition (Rāmānujācārya): Rāmānujācārya, in his commentary on the Bhagavad Gītā, views this verse as an emphasis on the role of devotion and surrender in acquiring divine knowledge. The inability to see, hear, or perceive with the mind is seen as a metaphor for the jīva's (individual soul's) inherent limitations and separation from Īśvara (the Lord). The verse suggests that only through devotion and the grace of the Lord can the jīva overcome these limitations and attain a glimpse of the divine. Rāmānuja's perspective on this verse highlights the importance of bhakti (devotion) as a means to bridge the gap between the individual and the divine, ultimately leading to a realization of the jīva's dependent yet intimate relationship with Īśvara. This interpretation underscores the Vaiṣṇava emphasis on personal devotion and the path of prapatti (surrender) as the means to attain spiritual liberation.

Neo-Vedānta (Swami Vivekānanda): Swami Vivekānanda, in his lectures and writings, often emphasized the practical and universal application of verses like this one from the Bhagavad Gītā. He saw this verse as a call to introspection and self-awareness, highlighting the limitations of our ordinary perception and understanding. Vivekānanda would interpret 'yo na draṣṭum' and 'na śrauṇ' as symbols of the ego's inability to grasp the deeper truths of existence through external means alone. He advocated for a direct, experiential approach to spiritual knowledge, emphasizing the importance of meditation and the cultivation of inner awareness. In contemporary terms, this verse can be seen as a reminder of the need to look beyond surface-level appearances and to engage in profound self-reflection. It encourages us to recognize our limitations and to seek a deeper, more profound understanding of ourselves and the world, echoing Vivekānanda's message of the potential for human liberation through self-realization.

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