If you are going to read this as theory, as something 'interesting,' do yourself a favor and go to another website.
I don't intend this to be mean or exclusive. What I am saying is that if you are just reading this out of interest, you won't find it that interesting. If you are reading this as theory, you will be bored with its simplicity. If you are reading this with the idea that 'someday' you will 'get it' and for now you just want to take in as much information about 'it' as you can, give up. If you are reading this and willing to DO what it suggests, keep reading.
Right now, in THIS very moment, notice...
What is KNOWING those things?
WHATEVER just came to mind - What SEES that?
And the flurry of thoughts that just occurred, what KNOWS that?
IT cannot be named.
IT cannot be seen, heard, felt, tasted, smelled or conceptualized.
Rest as that.
A million times identified as sound, sensation, sight, odor, thought...and a million times just rest.
When in doubt, read this again.