88. Now, without some grasp of what correspondence is, nothing can be known in clear light about the spiritual world or about its inflow into the natural world, nothing at all about what the spiritual is relative to the natural, nothing in clear light about the human spirit that is called "the soul" and how it affects the body inwardly, nothing about our state after death. Because of all this, I need to define it and explain what it is like. This will also pave the way for matters that are to follow.