beautifully in the choice of symbol how libido is opposed to libido, will against will, the discordance of primitive man with himself, which he recognizes again in all the adversity and contrasts of external nature. The symbol of the tree encoiled by the serpent may also be translated as the mother defended from incest by resistance. This symbol is by no means rare upon Mithraic monuments. The rock encircled by a snake is to be comprehended similarly, because Mithra is one born from a rock. The menace of the new-born by the snake (Mithra, Hercules) is made clear through the legend of Lilith and Lamia. Python, the dragon of Leto, and Poine, who devastates the land of Crotopus, are sent by the father of the new-born. This idea indicates the localization, well known in psychoanalysis, of the incest anxiety in the father. The father represents the active repulse of the incest wish of the son. The crime, unconsciously wished for by the son, is imputed to the father under the guise of a pretended murderous purpose, this being the cause of the mortal fear of the son for the father, a frequent neurotic symptom. In conformity with this idea, the monster to be overcome by the young hero is frequently a giant, the guardian of the treasure or the woman. A striking example is the giant Chumbaba in the Gilgamesh epic, who protected the garden of Ishtar;[545] he is overcome by Gilgamesh, whereby Ishtar is won. Thereupon she makes erotic advances towards Gilgamesh.[546] This data should be sufficient to render intelligible the rôle of Horus in Plutarch, especially the violent usage of Isis. Through overpowering the mother the hero becomes equal to the sun; he reproduces himself. He wins the strength of the invincible sun, the power of eternal rejuvenation. We thus understand a series of representations from the Mithraic myth on the Heddernheim relief. There we see, first of all, the birth of Mithra from the top of the tree; the next representation shows him carrying the conquered bull (comparable to the monstrous bull overcome by Gilgamesh). This bull signifies the concentrated significance of the monster, the father, who as giant and dangerous animal embodies the incest prohibition, and agrees with the individual libido of the sun-hero, which he overcomes by self-sacrifice. The third picture represents Mithra, when he grasps the head ornament of the sun, the nimbus. This act recalls to us, first of all, the violence of Horus towards Isis; secondly, the Christian basic thought, _that those who have overcome attain the crown of eternal life_. On the fourth picture Sol kneels before Mithra. These last two representations show plainly that Mithra has taken to himself the strength of the sun, so that he becomes the lord of the sun as well. He has conquered “his animal nature,” the bull. The animal knows no incest prohibition; man is, therefore, man because he conquers the incest wish, that is, the animal nature.