It is a fundamental error to turn the pure mind into an object of experience in an attempt to reach comprehension. Mind can know everything else and is the inescapable condition of every experience, for by its light every object and every event is revealed, but it cannot itself be known in the same way that we know everything else. Ordinarily there is a knower and a known, and mind would have to transcend such a relation were it to become aware of itself, which means that it would have to transcend thinking itself. Mind itself produces the categories of time, space, and cause which make world experience possible and knowable--that is, thinkable--which is why it cannot be grasped in the same way. The nature of mind is unique, and before its sublime verity speech trembles into silence.
-- Notebooks Category 28: The Alone > Chapter 2: Our Relation To the Absolute > # 74