89. First, what correspondence is. The whole natural world corresponds to the spiritual world, and not merely the natural world in general, but also every particular of it; and as a consequence everything in the natural world that springs from the spiritual world is called a correspondent. It must be understood that the natural world springs from and has permanent existence from the spiritual world, precisely like an effect from its effecting cause. All that is spread out under the sun and that receives heat and light from the sun is what is called the natural world; and all things that derive their subsistence therefrom belong to that world. But the spiritual world is heaven; and all things in the heavens belong to that world.