Influence of the development of the brain upon the sexual impulse -- Relations between speech and love -- The psychic-emotional roots of love -- Love as a product of civilization -- Relation between the physical and the spiritual poietic impulse -- The “function-impulse” of Dr. Santlus -- Psychical sexual equivalents -- Schopenhauer, Hirth, and Mantagazza, on this subject -- Rôle of sexuality in the feelings of life -- The organic necessity of love -- Sexual philosophy -- The Marquis de Sade -- Otto Weininger -- Max Zeiss -- Relations of love to the individual feelings of personality -- The reproductive impulse and the conjugative impulse -- Love and love’s embrace as a personal aim. The psychogenetic fundamental law of love -- The way of the spirit in love -- Its tendency from the general to the individual -- From the remote to the proximate -- Love as a transcendental and as a personal relationship. The association of religio-metaphysical ideas with the sexual life -- A general anthropological phenomenon -- Anthropomorphistic-animistic explanation of the relation between religion and the sexual life -- Billroth’s scientific analysis of religious perception -- L. Feuerback, M’Lennan, and Tylor on this subject -- My own description of the psychological processes in the association between the religious and the sexual life -- The deification of love according to E. von Mayer -- Strongest in women -- Vicarious religions and sexual perceptions -- History of religio-sexual phenomena -- Religious prostitution -- Single and repeated acts of religious prostitution -- Sexual self-surrender to the deity or his representative -- Defloration by divine symbols -- Defloration deities among the Indians, the Jews, and the Romans -- Religious defloration by representatives of the deity -- The Babylonian Mylitta-cult -- Diffusion and explanation thereof -- Religious prostitution in India -- Among primitive peoples -- Bachofen’s brilliant explanation of religious prostitution as a counteraction to the individualization of love -- Contempt for virginity among primitive peoples -- Permanent religious prostitution -- Sexual intercourse as a consecrated act -- The temple-girls of the Greeks, Phœnicians, and Indians -- The Indian “nautch-girls” -- The sense of eternity in the religious and the sexual impulse -- Sexual mysticism -- Religio-erotic festivals -- Their wide diffusion -- Examples from antiquity, from India, and from Central and South America -- Sexual mysticism in Christianity -- Religio-sexual sects -- The “unio mystica” -- The primiz, or mystical marriage -- Mariolatry -- A religious poem.