Kāthakopaniṣat Bhāshya (काठकोपनिषत् )
2.2.08
Among all those who are asleep, the one who remains awake, creating desire after desire, is indeed the pure one, the Brahman, and is called the immortal. In that, all the worlds are contained, and no one can transcend it. This is that essence.

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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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