107. It is very necessary to be known that there are two suns, one spiritual, the other natural; a spiritual sun for those who are in the spiritual world, and a natural sun for those who are in the natural world. Unless this is known, nothing can be properly understood about creation and about man, which are the subjects here to be treated of. Effects may, it is true, be observed, but unless at the same time the causes of effects are seen, effects can only appear as it were in the darkness of night.