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

Māndukyōpanishad Bhāshya

prabhavaḥ sarvabhāvānāṃ satāmiti viniścayaḥ। sarvaṃ janayati prāṇaścetoṃ'śūn puruṣaḥ pṛthak ॥12॥

The origin of all beings is certainly in the 'sat' — the good, the reality. The Supreme person individually creates all aspects of life and conscious beings.

Ancient testimonial is quoted with the same terminology, 'sat' (good, reality) and 'asat' (false, non-reality), attributing the supreme person to Lord Narayana.

"prabhavaḥ sarvabhāvānāṃ viṣṇureva na saṃśayaḥ। itthaṃ satāṃ niścayaḥ syādanyathā tvasatāṃ bhavet। sarvasya hi praṇetṛtvāt prāṇo nārāyaṇaḥ paraḥ॥"

"Vishnu is undoubtedly the origin of all beings. Thus, there is the certainty of 'sat', i.e. good or reality; otherwise, it becomes unreal or bad. Indeed, due to being the leader of all life force, he is the supreme Lord Narayana."

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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