315. It should be known that the heat, light and atmospheres of the natural world contribute absolutely nothing towards this image of creation. It is only the heat, light and atmospheres of the Sun of the spiritual world that do so. These carry that image with them and clothe it with the forms of uses of the vegetable kingdom. The heat, light and atmosphere of the natural world merely open the seeds, hold their products in a state of expansion, and clothe them with matters which give them fixity. But this is done not by forces from their own sun, which viewed in themselves are null, but by forces from the spiritual Sun by which the natural forces are unceasingly impelled towards those services. As to giving them an image of creation, natural forces contribute absolutely nothing, for the image of creation is spiritual. In order, however, that the image may be manifest and perform a use in the natural world, and may stand fixed and be permanent, it must be materialised, that is, filled in with the matters of that world.