3. I. There are two worlds: the spiritual world, inhabited by spirits and angels, and the natural world, inhabited by men.
That there is a spiritual world inhabited by spirits and angels distinct from the natural world inhabited by men, has hitherto been deeply hidden, even in the Christian world, because no angel has descended and taught it by word of mouth, nor has any man ascended and seen it. Lest, therefore, from ignorance of that world, and the uncertain faith respecting heaven and hell thence resulting, man should be so far infatuated as to become an atheistic materialist, it has pleased the Lord to open the sight of my spirit, and to raise it into heaven and let it down into hell, and to exhibit to my view the nature of both.
[2] It has thus been made evident to me that there are two worlds, distinct from each other; one, in which all things are spiritual, whence it is called the spiritual world; and the other, in which all things are natural, whence it is called the natural world: and also that spirits and angels live in their own world, and men in theirs; and further, that every man passes by death from his world into the other, and lives in it to eternity. In order that Influx, which is the subject of this little work, may be unfolded from its beginning, it is necessary that some information respecting both these worlds should be provided; for the spiritual world flows into the natural world, and actuates it in all its parts, with both men and beasts, and also constitutes the vegetative principle in trees and herbs.