We tend to speak somewhat casually of "truth from the Lord," but in actual fact the Lord's truth -- the immediate expression of His infinite love -- is of such brightness and blinding power that it actually is light itself, the light of heaven, bright beyond human imagination, and must be filtered down through multiple levels to a state where we can form it into mental concepts and express it in language. Indeed, this is why the Bible is written with an internal sense; only through such indirect expression can it serve as a container for the real truth that lies hidden within. That brilliance, that overwhelming light from the Lord contained in the Bible, is what "glory" means in the Bible's natural language. That's why it is seen so often in passing, or imagined, or seen within a cloud: We cannot look at it directly.