Arcana Coelestia #41
41. Anything that is man's own has no life in it; and when depicted visually it looks like something hard as a bone and black. But anything that comes from the Lord does contain life. It has that which is spiritual and celestial within it, and when depicted visually it looks human and alive. It is perhaps incredible, but nevertheless absolutely true, that every expression, every idea, and every least thought of an angelic spirit is alive. In even the most detailed areas of his thought there is an affection that comes from the Lord, who is life itself. Consequently all that derives from the Lord has life within it, for it contains faith in Him, and is here meant by 'a living creature'. It then has the outward appearance of a body, meant here by that which is moving, or creeping. To man these matters remain arcana, but since the subject here is the living and moving creature, they ought at least to be mentioned here.
Arcana Coelestia #6608
6608. The light of understanding has been given to me, taken away, lessened, and moderated when I have been thinking, speaking, and writing. This has happened frequently, and I have been allowed to perceive the variations and differences. The actual light I perceived as illumination that shone on the substances of my inward sight just as the sun gives light to the physical organs of sight. This general illumination made matters of thought visible just as earthly objects become visible when the eye is supplied with light. I was told that those variations in the light of understanding arose from different kinds of contact with heavenly communities.