That is to say, the sphere of scortatory love which comes up from hell and the sphere of conjugial love which comes down from heaven each cause the person who receives them to feel joys. The reason is that the lowest level, where the pleasures of either love come to an end, and where they are completed and fulfilled, presenting them to the organs of sense, is the same. This is why scortatory and conjugial embraces seem alike in their outermost results, though they are entirely different inwardly. There is thence a difference at the outermost, but this cannot be judged by any feeling of distinction. For only those who enjoy truly conjugial love can tell differences from distinctions at the outermost level. For evil is recognised from a knowledge of good, not good from a knowledge of evil, just as neither can a pleasant smell be detected by a nose which has a foul smell in it. I have heard from angels that they can tell one who is wanton at the outermost level from one who is not, just as one can tell apart a fire of burning dung or horn by its disagreeable smell from one of burning incense or cinnamon wood by its sweet smell. This, they said, is the result of distinguishing inward pleasures which enter into and excite outward pleasures.