Kāthakopaniṣat Bhāshya (काठकोपनिषत् )
2.3.18
Nachiketa, after receiving the knowledge imparted by Death, and mastering the complete method of yoga, becoming pure, attained Brahman, and became immortal. Anyone else who practices in this manner concerning the Ātman also achieves the same result.
Bhāṣya 2.3.18
"I offer my salutations to the auspicious Lord Viṣṇu, the all-powerful one. He, whom I have reached through the trusted-wise, is always the most trusted-wise person accessible to me."
Therefore, it is established that Lord Viṣṇu is the supreme principle among all.
"I offer my salutations to the auspicious Lord Viṣṇu, the all-powerful one. He, whom I have reached through the trusted-wise, is always the most trusted-wise person accessible to me."
Thus ends the commentary on the Katha Upanishad composed by the revered teacher Ānandatīrtha Bhagavatpāda.
This marks the end of the third section in the second chapter.
This marks the conclusion of the Katha Upanishad.

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बहुचित्रजगद्बहुधाकरणात् परशक्तिरनन्तगुणः परमः ।
सुखरूपममुष्य पदं परमं स्मरतस्तु भविष्यति तत्सततम् ॥
"The one who has created this variegated vast universe with varied forms has infinite power and is of infinite auspicious qualities. He certainly bestows the highest state of bliss to those who meditate on his ever happy essence." -Dwādasha stōtra 4.3

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