Odin was very sorry when he heard the words of Mimer, and yet he did not deem the price too great; for plucking out his right eye, and casting it from him, he received in return a draught of the fathomless deep. As Odin gave back the horn into Mimer's hand he felt as if there were a fountain of wisdom springing up within him--an inward light; for which you may be sure he never grudged having given his perishable eye. Now, also, he knew what it was necessary for him to do in order to become a really noble Asa,[1] and that was to push on to the extreme edge of the earth itself, and peep over into Niflheim. Odin knew it was precisely that he must do; and precisely that he did. Onward and northward he went over ice-bound seas, through twilight, fog, and snow, right onward in the face of winds that were like swords until he came into the unknown land, where sobs, and sighs, and sad, unfinished shapes were drifting up and down. "Then," said Odin, thoughtfully, "I have come to the end of all creation, and a little further on Niflheim must lie." [1] Asa--the singular of Æsir. Accordingly he pushed on further and further until he reached the earth's extremest edge, where, lying down and leaning over from its last cold peak, he looked into the gulf below. It was Niflheim. At first Odin imagined that it was only empty darkness; but, after hanging there three nights and days, his eye fell on one of Yggdrasil's mighty stems. Yggdrasil was the old earth-tree, whose roots sprang far and wide, from Jötunheim, from above, and this, the oldest of the three, out of Niflheim. Odin looked long upon its time-worn, knotted fibres, and watched how they were for ever gnawed by Nidhögg the envious serpent, and his brood of poisonous diseases. Then he wondered what he should see next; and one by one spectres arose from Naströnd, the Shore of Corpses--arose and wandered pale, naked, nameless, and without a home. Then Odin looked down deeper into the abyss of abysses, and saw all its shapeless, nameless ills; whilst far below him, deeper than Naströnd, Yggdrasil, and Nidhögg, roared Hvergelmir, the boiling cauldron of evil. Nine nights and days this brave wise Asa hung over Niflheim pondering. More brave and more wise he turned away from it than when he came. It is true that he sighed often on his road thence to Jötunheim; but is it not always thus that wisdom and strength come to us weeping. PART IV. THE CHILDREN OF LOKI.