Śvetāśvatara Upaniṣad · 3..9

योऽव्यक्ते तिष्ठन् यमव्यक्तं न वेद यस्याव्यक्तं शरीरं योऽव्यक्तेऽन्तरो यमयत्येष त आत्मान्तर्याम्यमृतः

yo'vyakte tiṣṭhan yam avyaktaṃ na veda yasyāvyaktaṃ śarīraṃ yo'vyakte'ntaro yamayaty eṣa ta ātmāntaryāmy amṛtaḥ

He who, dwelling in the unmanifest, whom the unmanifest does not know, whose body is the unmanifest, who controls the unmanifest from within —He is your Ātman, the Inner Ruler, the Immortal.

The avyakta (unmanifest) is pradhāna, primordial matter before manifestation, the state of equilibrium of guṇas. Even this causal state, prior to everything we experience, is inhabited and governed by the antaryāmin. In our yoga practice, this points toward the beyond of all “beyonds”: not only transcending mind, ego, elements, but even the very possibility of manifestation. And yet, there is someone who knows of all this —the Ātman, the Immortal.