US-P17.001ab ।US-P17.001cd ॥
In plain words
The Self is what is to be known — the supreme Self, and there is nothing else besides it to be found. Knowing everything, seeing everything, pure: to that Self, the one to be known, I bow.
Close to the Sanskrit
The Self is to be known — indeed the supreme Self, than which no other is found. All-knowing, all-seeing, pure: to that Self who is to be known, salutation.