Madhvacharya's Dvaita Vedanta and translation of Sarvamoola containing Bhagavad Gita, Upanishads, and Brahmasutra.

Kāthakopaniṣat Bhāshya (काठकोपनिषत् )

pra te bravīmi tadu me nibodha svargyam agniṁ naciketaḥ prajānan. anantalokāptim atho pratiṣṭhāṁ viddhi tvam etaṁ nihitaṁ guhāyām ॥13॥

To you I declare—do learn this from me, O Naciketas, the heavenly fire, understanding which one attains infinite worlds and the firm foundation. Know this, placed within the secret cave (of the heart).

It is lord Vishnu, the foundation of all worlds, who dwells in all hearts.

loko viṣṇor anantasya taj-jñānān nitya āpyate. pratiṣṭhā sarvalokasya sa viṣṇuḥ sarvahṛd-gataḥ॥

"The world of the infinite Viṣṇu is eternally attained by the knowledge of him. He, Viṣṇu, the foundation of all worlds, dwells in all hearts."

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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