77. Besides the spirits who have now been mentioned, there are also spirits who persuade the contrary. They are those who while they lived in the world, were banished from the society of others, because they were evil. When they approach, there appears as it were a flying fire, that glides down near the face. They place themselves low down behind the man, and speak thence toward the upper parts. They speak things contrary to what the instructing spirit has said from the angels, namely, that one should not live according to the instruction, but of his own will and license, and similar things. They come for the most part after the former spirits have gone away, but the men there know who and what these spirits are, and therefore care nothing for them; yet they learn in this way what evil is, and so what good is; for by evil it is learned what good is, since the quality of good is known from its opposite. All perception of a thing is according to reflection in regard to its distinctions from things contrary, in various ways and various degrees.