578. The worst of all are those who have been in evils from love of self and at the same time inwardly in themselves have acted from deceit; for deceit penetrates more deeply into the thoughts and intentions and infects them with poison and thus wholly destroys a man's spiritual life. Most of these are in the hells behind the back, and are called genii; and there they delight to make themselves invisible, and to flutter about others like phantoms, secretly infusing into them evil, which they spread around like the poison of a viper. These are more direfully tormented than others. But those who are not deceitful, and who have not been so filled with malignant craftiness, and yet are in the evils derived from the love of self; are also in the hells behind, but in those less deep. On the other hand, those who have been in evils from the love of the world are in the hells in front, and are called spirits. These spirits are not such forms of evil, that is, of hatred and revenge, as are those who are in evils from the love of self; they therefore do not have such malice and cunning; and in consequence their hells are milder.