91. Given this kind of difference between the warmth and light of the two worlds, it is obvious why people who live in one of the worlds cannot see people who are living in the other. Our eyes, which see in physical light, are made of substances of their own world, and angels' are made of substances of their world. In other words, in each case they are designed for adequate sensitivity to their own light.
We can see from this what ignorance underlies the thinking of people who exclude from their faith any notion that angels and spirits are people, simply because they do not see them with their own eyes.
