The mystic mind tends to hold the world together: to behold the seen in conjunction with the unseen, to keep the fellowship with the unknown through the revolving door of the unknown, to learn the higher supernal wisdom from all that God had created and to regain the knowledge that once was in the possession of humans and that has perished from them. What our senses perceive is but the jutting edge of what is deeply hidden. Extending over into the invisible, the things of this world stand in secret contact with that which no eye has ever perceived. Everything certifies the sublime, the unapparent working jointly with the apparent.
--Rabbi Abraham Joshua Heschel (1907-1972), The Mystical Element in Judaism