The experience of our (you) divine Self (you) (the self realized), - which stays in the kingdom called body which consists of nine gates - is the abode of all knowledge.
In knowing ourselves (you) (Supreme), we (you) know all. Know thyself (yourself) is the basis of all knowledge.
Both what has been seen and what has not been seen, both what has been heard and what has not be heard, both what has been experienced and what has not been experienced, both the real and the unreal-he / she (you) sees all.