104. At this day it is unknown what Perception is. It is a certain internal sensation from the Lord alone, as to whether a thing is true and good; and it was very well known to the Most Ancient Church. This perception is so perfect with the angels, that by it they are aware and have knowledge of what is true and good; of what is from the Lord, and what from themselves; and also of the quality of anyone who comes to them, merely from his approach, and from a single one of his ideas. The spiritual man has no perception, but has conscience. A dead man has not even conscience; and very many do not know what conscience is, and still less what perception is.