2990. It is also known, or may be known, that there is a spiritual world, and also a natural world. In the universal sense the spiritual world is where spirits and angels dwell; and the natural world is where men dwell. In particular, there is a spiritual world and a natural world with every man: his internal man being to him a spiritual world, and his external man being to him a natural world. The things that flow in from the spiritual world and are presented in the natural world, are in general representations; and insofar as they agree they are correspondences.