In the spiritual world in which angels and spirits are, there are heat and light just as in the natural world in which men are. And moreover, the heat is felt as heat, and similarly light is seen as light. But yet the heat and light of the spiritual world and that of the natural world differ to such an extent that they have nothing in common, as was stated above. They differ from each other as the living and the dead. The heat of the spiritual world in itself is living and likewise the light, while the heat of the natural world in itself is dead, likewise the light. For the heat and light of the spiritual world come forth from the Sun which is pure Love, whereas the heat and light of the natural world come forth from a sun which is pure fire. Further, Love is living and Divine Love is Life Itself, and fire is dead and the fire of the sun is death itself, and so it can be called, from the reason that there is absolutely nothing of life in it.