7. Nor can the difference between these levels be known unless one is acquainted with correspondence, for these three levels are each completely distinct from the others, like end, cause and effect, or like something prior, something subsequent, and something terminal. And yet they operate as a unit through correspondences. For something natural corresponds to something spiritual, and also to something celestial.
But what correspondence is may be seen in the book Heaven and Hell, where it is discussed in The Correspondence of Everything in Heaven with Everything in the Human Being, nos. Heaven and Hell, nos. 87-102, and in The Correspondence of Heaven with Everything on Earth, nos. 103-115. It will also be further seen below from illustrations presented from the Word.
