Love, immortality, heart, soul
Love can release, save, redeem and free the soul – give it eternal life, immortality – e.g. the little mermaid or "Alferne paa Heden" ('the faries on the moor'), who may be given eternal life from the love of a human, or, in the case of the fairies, by "a tear of remorse or empathy from the human heart", the angel's love for Inger in "The Girl, Who Trod on the Loaf", Gerda's tears, which thaw Kay's frozen heart in "The Snow Queen" or Sorrow's tear in "The Last Pearl", the pearl that lifts the soul towards the eternal.
According to Flemming Hovmann's commentary p. 95 in vol. 7 of H.C. Andersens eventyr, Dansk Sprog- og Litteraturselskab / Borgen 1990, it is a wellknown motif in popular belief, that tears have such power.
Everyone there lay sound asleep. The Viking's wife had gone to bed late that night because she was so worried about Helga, who had been missing ever since the Christian priest disappeared three days ago. She must have helped him escape, for it was her horse that was gone from the stable. But what power could have brought this about? The Viking's wife thought of all the miracles she had heard were performed by the White Christ and by those who had the faith to follow Him. Her troubled thoughts gave way to dreams. She dreamed that she lay there, on her bed, still awake, still lost in thought while darkness reigned outside. A storm blew up. To the east and to the west she heard the high seas roll-waves of the North Sea and waves of the Kattegat. The great snake, which in the depth of the ocean coils around the earth, was in convulsions of terror. It was the twilight of the gods, Ragnarok, as the heathens called Judgment Day, when all would perish, even their highest gods. The war horn sounded, and over the rainbow bridge the gods rode, clad in steel, to fight their last great fight. The winged Valkyries charged on before them, and dead heroes marched behind. The whole firmament blazed with the Northern Lights, yet darkness conquered in the end. It was an awful hour.
Beside the terror-stricken dreamer, little Helga seemed to crouch on the floor, in the ugly frog's shape. She shuddered, and crept close to her foster mother, who took the creature up in her lap and, hideous though it was, lovingly caressed it. The air resounded with the clashing of swords and clubs, and the rattle of arrows like a hailstorm upon the roof. The hour had come when heaven and earth would perish, the stars would fall, and everything be swallowed up by Surtur's sea of fire. Yet she knew there would be a new heaven and a new earth. The grain would grow in waving fields where the sea now rolled over the golden sands.
Then the god whose name could not yet be spoken would reign at last, and to him would come Balder, so mild and loving, raised up from the kingdom of the dead. He came, and the Viking's wife saw him clearly. She knew his face, which was that of the captive Christian priest. "The White Christ," she cried aloud, and as she spoke that name she kissed the ugly brow of her frog child. Off fell the frog skin, and it was Helga who stood before her in radiant beauty, gentle as she had never been before, and with beaming eyes. She kissed her foster mother's hands, and blessed her for all the loving kindness that had been lavished upon her in those days of bitter trials and sorrow. She thanked the Viking's wife for the thoughts she had nurtured in her, and for calling upon the name which she repeated-the White Christ. And little Helga arose in the shape of a white, mighty swan. With the rushing sound of a flock of birds of passage taking flight, she spread her powerful wings.