Whilst the Æsir were building their city, Loki, instead of helping them, had been continually running over to Jötunheim to make friends amongst the giants and wicked witches of the place. Now, amongst the witches there was one so fearful to behold in her sin and her cruelty, that one would have thought it impossible even for such an one as Loki to find any pleasure in her companionship: nevertheless, so it was that he married her, and they lived together a long time, making each other worse and worse out of the abundance of their own wicked hearts, and bringing up their three children to be the plague, dread, and misery of mankind. These three children were just what they might have been expected to be from their parentage and education. The eldest was Jörmungand, a monstrous serpent; the second Fenrir, most ferocious of wolves; the third was Hela, half corpse, half queen. When Loki and his witch-wife looked at their fearful progeny they thought within themselves, "What would the Æsir say if they could see?" "But they cannot see," said Loki; "and, lest they should suspect Witch-wife, I will go back to Asgard for a little while, and salute old Father Odin bravely, as if I had no secret here." So saying, Loki wished his wife good-morning, bade her hide the children securely in-doors, and set forth on the road to Asgard.

But all the time he was travelling Loki's children went on growing, and long before he had reached the lofty city Jörmungand had become so large, that his mother was obliged to open the door to let his tail out. At first it hung only a little way across the road; but he grew, Oh, how fearfully Jörmungand grew! Whether it was from sudden exposure to the air, I do not know; but, in a single day he grew from one end of Jötunheim to the other, and early next morning began to shoot out in the direction of Asgard. Luckily, however, just at that moment Odin caught sight of him, when, from the top of Air Throne, the eyes of this vigilant ruler were taking their morning walk. "Now," said Odin, "it is quite clear, Frigga, that I must remain in idleness no longer at Asgard, for monsters are bred up in Jötunheim, and the earth has need of me." So saying, descending instantly from Air Throne, Odin went forth of Asgard's golden gates to tread the earth of common men, fighting to pierce through Jötunheim, and slay its monstrous sins.

In his journeyings Odin mixed freely with the people of the countries through which he passed; shared with them toil and pleasure, war and grief; taught them out of his own large experience, inspired them with his noble thoughts, and exalted them by his example. Even to the oldest he could teach much; and in the evening, when the labours of the day were ended, and the sun cast slanting rays upon the village green, it was pleasant to see the sturdy village youths grouped round that noble chief, hanging open mouthed upon his words, as he told them of his great fight with the giant of long ago, and then pointing towards Jötunheim, explained to them how that fight was not yet over, for that giants and monsters grew round them on every side, and they, too, might do battle bravely, and be heroes and Æsir of the earth.

One evening, after thus drinking in his burning words they all trooped together to the village smithy, and Odin forged for them all night arms and armour, instructing them, at the same time, in their use. In the morning he said, "Farewell, children; I have further to go than you can come; but do not forget me when I am gone, nor how to fight as I have taught you. Never cease to be true and brave; never turn your arms against one another; and never turn them away from the giant and the oppressor."

Then the villagers returned to their homes and their field-labour, and Odin pressed on, through trackless uninhabited woods, up silent mountains, over the lonely ocean, until he reached that strange, mysterious meeting-place of sea and sky. There, brooding over the waters like a grey sea fog, sat Mimer, guardian of the well where wit and wisdom lie hidden.

"Mimer," said Odin, going up to him boldly, "let me drink of the waters of wisdom."

"Truly, Odin," answered Mimer, "it is a great treasure that you seek, and one which many have sought before, but who, when they knew the price of it, turned back."

Then replied Odin, "I would give my right hand for wisdom willingly."

"Nay," rejoined the remorseless Mimer, "it is not your right hand, but your right eye you must give."

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, 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."

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.