Brahman is atman

 Brahman is atman

Atman is devoid of knowerness

Atman is not a knower, knowerness is mithya, maya sahita atma

Atman is existence

Atman is chit , in other words reality of knower

Atman is ananta, in other words sat this is not bound by time or space or limited by any object

In other words its the reality of all objects

Chit anantam means reality of knower, not limited to a knower OF

sat anantam means reality of known and knowledge, not limited to any particular known or knowledge

Sat anantam and chit anantam are same.

Which means chit anantam is itself sat anantam.

The basic reality of object is sat anantam

It is not matter. 

Basic reality of object is non material

It is non knower

It is chit anantam, reality of knower

It is tamas pradana atma

sattva pradana atma is ishvara

rajas pradana atma are jivas

becuase while atma is pure chit, it is not a knower

it is just pure self shining being

Self shining being becomes a knower in presence of mind or maya

I know, happens.

I know is essentially mind and vrtti jnanam.

here the chit pervades vrtti and chit is the knower as well

I know is primarily 

I = sakshi chaitanyam. This is pure chit.

Know = vrtti jnanam, reality of which is chit. Chit is as though enclosed by vrtti jnanam. Chit is cause for vrtti jnanam, Un affected cause.