1610. The inward heaven, therefore, is at a level within the world of spirits. For the world of spirits is separate from heaven because spirits draw what is theirs from bodily elements, and so are joined to the bodily and worldly regions. Or said in another way, the world of spirits relates to our bodily regions just as the denser atmospheric plane relates to the terraqueous globe. So the world of spirits occupies the inward bodily regions.