Ludwick's Tieck's aim in writing his tales is to dri the readers' attention to the point of distraction. He didn't ha any moral purpose in writing his tales but the one to create enigmas and to gi a little confusion to his readers.
In "Der blonde Eckbert" he creates a sort of continuous contamination between the "wunderbares Welt" and the "altagliches Welt". The line between these two worlds is ner clearly traced, especially in the second part of the tale.
In the first part, the narrator presents to the reader a knight whose name is Eckbert and who is well known and belod by his people. The reader's expectations are about a knight's tale, but quite soon, Eckbert's wife Bertha is introduced into the narration and she becomes narrator for a little. Actually, she tells to their friend Walther the story of her youth, remarking the fact that her tale could look like a fairy tale, but it is something completely true.
She starts telling about her bad relationship with her father and about the facts that led her to run away from home at the age of eight. She wandered for fi days, before she met an old woman who she follows into the woods, where she lid, and she decides to stay there.

In the old woman's house there are a little dog, whose name Bertha is not able to remember, and a bird that lays pearls and gems. Moreor the bird used to sing a song about their life in the "Waldinsamkeit".
Bertha stayed there for six years and she spent her time taking care of the animals and of the house, while the old woman is away. During this time, she becomes part of that magical world and she is almost became a fairy tale creature. The problem is that she could ha been just dreaming one of the dreams she used to do in her father's house. Actually, her father used to reproach her because of that and because she wasn't able to do any of the things she learns in the old woman's house. Moreor, the magical bird is a sort of incarnation of her dream to make her parents rich and happy finding a treasure. In addition to that, there is the fact that, while she stays in the woods, she dreams about meeting and marrying a beautiful knight: something that happens when she meets Eckbert.
Bertha's character is well depicted by her own dreams (en the first night she spends in the old woman's hut, she can't understand if the voices she hears are a dream or reality) and by the fact that she passes through different stages during her life. She is a human character, then a supernatural character and again a human character. En her suddenly illness and death ha nothing to do with reality. Walther has caused her "break down", when he says to her the little dog's name. Indeed, the reader will soon discor that first the old woman has taken the shape of Walther and that of Hugo then.
It seems that pronouncing the little dog's name the man is almost giving advice to his friends that he is not who they think he is. From that moment, Walther starts to seem to ha sort of magical powers and this makes Eckbert uncomforle at the point that he decides to kill him, because he thinks Walther is hunting him. Actually, Eckbert thinks to see his friend almost erywhere and he will confuse Hugo with him. This last fact could en be something true, but it could be a simple result of Eckbert's increasing paranoia, that doesn't begin in that moment but long time ago.
His paranoia could ha been a result of a transfer from his wife paranoia to him. Actually she killed the bird because she wasn't comforle with it anymore and she wasn't that comforle with her maid as well. Bertha's sins seem to ha substitute Eckbert's ones, so he looses protection against the real self- reproach as his idea of being persecuted grows up. Consequently, he gets deeper into madness and paranoia and he cuts himself from the physical realities of his life.
Moreor, he has always had the feeling that something wrong was in his marriage. This is something that he has always tried not to discor because he was scared of what he could ha discored.
Pushed by his fears, he decides to go to look for the old woman. Entually he finds her and he discors that he had commit incest because Bertha was his sister and that his friend Walther first, Hugo then were just the old woman. In this moment he dies, but it doesn't seem a proper death because he can still hear the old woman, the dog barking and the bird singing. One more time it is not clear what is real or what is just a result of his madness.