520. To this I will add a memorable fact respecting the ways that lead from these places to heaven, by which the newly arrived angels are introduced. There are eight ways, two from each place of instruction, one going up in an eastern direction the other towards the west. Those that enter the Lord's celestial kingdom are introduced by the eastern way, while those that enter the spiritual kingdom are introduced by the western way. The four ways that lead to the Lord's celestial kingdom appear adorned with olive trees and fruit trees of various kinds; but those that lead to the Lord's spiritual kingdom appear adorned with vines and laurels. This is from correspondence, because vines and laurels correspond to affection for truth and its uses, while olives and fruits correspond to affection for good and its uses.
