On Mundaka Upanishad: Not many, not one, not zero

Following is an excerpt from a samvaad (dialogue) session with Acharya Prashant.

गताः कलाः पञ्चदश प्रतिष्ठा देवाश्च सर्वे प्रतिदेवतासु ।
कर्माणि विज्ञानमयश्च आत्मा परेऽव्यये सर्वे एकीभवन्ति ॥

gatāḥ kalāḥ pañcadaśa pratiṣṭhā devāśca sarve pratidevatāsu
karmāṇi vijñānamayaśca ātmā pare’vyaye sarve ekībhavanti

The fifteen parts return into their foundations, and all the gods pass into their proper godheads, works, and the Self of Knowledge, all become one in the Supreme and Imperishable.

~ Verse 3.2.7

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Acharya Prashant (AP): “The fifteen parts return into their foundations, and all the gods pass into their proper godheads, works and the Self of Knowledge, all become one in the Supreme and Imperishable.”

So, what is the context? What are we referring to here? We are referring here to the ultimate state possible.

What is it that the mind finally wants? What is it that happens, rather stops happening once…