US-P15.038ab ।US-P15.038cd ॥
In plain words
"The witness of every thought, the knower itself — how am I supposed to know that?" Sit with the question just like that. Then find out for yourself: has Brahman been known, or has it not?
Close to the Sanskrit
"The witness of all cognitions, the knower — how is he to be known by me?" — thus, or else: having reflected in this way, one should discern whether Brahman is known, or not.