Emptiness?

“…it is only in emptiness, in complete emptiness, that a new thing can be.”

Krishnamurti

I can’t know what complete emptiness is because I can’t experience it. So how does the brain know when its completely empty? Can any part of the brain acknowledge its emptiness if every part of the brain is empty? Or by “emptiness”, did Krishnamurti mean the absence of psychological content, seeing as how the brain can’t acknowledge anything new without practical content required to do that? Or is awareness of the emptiness of the brain outside of, beyond the brain?

If complete emptiness is a “new thing”, it’s new to the old brain which is effectively dead now that emptiness matters more than content. If the brain must constantly clear itself of accumulated content in order to operate in an orderly way, I can be nothing but a pronoun used in communication with other human brains.