Kaivalya Upaniṣad 23

Diving deeper into the teaching, Ashvalayana reflects on how the 'this cognition'- Idam Pratyaya gochara, folds into the 'I cognition'- Aham pratyaya gochara, making everything non-separate from 'I' and non-dually one. This is Sarvātmābhava. The consciousness 'I', alone is. I am everything, yet no object am I. How this "one became many" is explained in this talk. Further, we understand through Asvalayana's reflections that 'I' am that self evident chit, ever free, beyond all names and forms.