En Sof is hidden, inscrutable, and incapable of revelation, progressively emanating itself through ten levels of the sefiroth. One kabbalist technique relates every single word to one or other of the sefiroth, so that each word has its counterpart in the inner life of En Sof itself. Another is to combine the letters of the divine Name in different combinations in order to divorce the mind from concrete perceptions. The mystic ascends through the levels of the emanations of the En Sof by way of the sefiroth, which thus also represent levels in human consciousness. I don't know any more in detail.
Kabbalism is a Jewish form of mysticism.
It seems to Frye that literature is also a technique of meditation. We journey through the text, then stop and confront it, although since it is by then a part of ourselves, an inner journey begins. Objects and doctrines don't matter, but symbols and metaphors do. Words have the power to break through the defenses of the ego to reach new, ecstatically defined states of consciousness. Literature is Frye's form of mysticism.