This case, like the former, illustrates the inner relations between jealousy, homosexuality and sadism. For during her fits of anger she entertained terrible thoughts of revenge. She thought of burning down the home; of killing her sister, as well as herself, by turning on the gas in the room; she tried to secure a revolver, supposedly as a protection against thieves. Her dreams show a criminal personality in sharp contrast to her customary mild character. Emotionally the criminal in her was much more powerful than her cultural self, she could have assaulted her sister and once actually drew a knife. After such emotional outbreaks she crumpled and became again the quiet, soft girl, beloved of everybody on account of her good nature. IV JEALOUSY AND PARANOIA—JEALOUSY AS PROJECTION OF ONE’S OWN INADEQUACY—FREUD’S RESEARCHES ON PARANOIA—THE INVESTIGATIONS OF JULIUSBURGER—THE JEALOUSY OF A PARANOIAC—JEALOUSY DELUSION OF A MERCHANT—JEALOUSY AND ALCOHOLISM—THE EVOLUTION OF MANKIND FROM BISEXUALITY TO MONOSEXUALITY—METAMORPHOSIS SEXUALIS PARANOICA—THE MONOTHEISM OF SEXUALITY—JEALOUSY AND CRIMINALITY. _Die Eifersucht wird immer mit der Liebe geboren aber stirbt nicht immer mit ihr._ —_La Rochefoucauld._ IV _Jealousy always arises with love but does not always die out with it._ —_La Rochefoucauld._ It is very striking that the feeling of jealousy breaks through all the barriers of culture. Extraordinarily frequent are suspicions of incest,[18] of homosexuality, of masturbation, and zoöphily. Women accuse their husbands of relations with their daughter; or they accuse the man of homosexual relations with a friend. Men bring similar accusations against their wives. All such accusations are projections of subjective sexual tendencies upon the object of their jealousy. _Beaussart_ (_La Jalousie; Annales Psychiques_, vol. LXXI, 1913), who maintains erroneously that morbid jealousy is more frequent among men than among women, brings out very strongly this peculiarity of jealousy and bases it on the absence of true motivation. But the motivation is transparent enough. Among the cases reported by him I note that of a 75-year-old woman who tortured her husband to death with her groundless jealousy and who, in a rage, one day, attacked him with a razor. Jealousy is clearly a rationalization of hatred, it harks back to the primary egoistic attitude of the aboriginal man. The phyletic raw sexuality and criminality corresponds to man’s primary ontogenetic attitude towards his environment.