115. Still, there is no understanding how the Lord is in an angel and an angel is in the Lord except through knowing what kind of union is involved. It is a union of the Lord with the angel and of the angel with the Lord, so it is a reciprocal union. On the angel's side, it is like this. Angels, like us, simply feel as though they participate in love and wisdom on their own, and therefore that love and wisdom are theirs, their very own. If they did not feel this way there would be no union, so the Lord would not be in them, nor they in the Lord. It cannot happen that the Lord is in any angels or people unless they, as subjects of his presence in love and wisdom, sense and feel this as their own. This enables them not only to accept but also to retain what they have accepted, and to love in response. This, then, is how angels become wise and remain wise. Can people decide to love God and their neighbor, can people decide to gain wisdom, unless they feel and sense that what they love, learn, and gain is their own? Can they retain anything in themselves otherwise? If it were not for this, then the inflowing love and wisdom would have no seat. They would flow right through without making any difference; and as a result angels would not be angels and people would not be human. They would be virtually lifeless.

It makes sense, then, that if there is to be union, there must be reciprocity.

321. It should be known that in outward appearance the spiritual world is just like the natural world. One sees there lands, mountains, hills, valleys, plains, fields, lakes, rivers, and springs, just as in the natural world, thus all the phenomena belonging to the mineral kingdom. One sees also parks, gardens, groves, and forests, in which are found trees and bushes of every kind, with fruits and seeds, and plants, flowers, herbs, and grasses, thus all the phenomena belonging to the plant kingdom. One sees animals, birds, and fish of every kind, thus all the phenomena belonging to the animal kingdom. A person there is an angel or spirit.

This much is premised in order to make it known that the universe of the spiritual world is just like the universe of the natural world, the only difference being that the phenomena which exist there are not fixed and set like phenomena in the natural world, because nothing there is natural, but everything spiritual.