Ondine's curse

Ondine's curse links a child’s life-threatening breathing disorder to a myth of betrayal and a character’s troubled sense of guilt. The condition is described as an unexplained medical mystery: the child breathes normally while awake but stops breathing asleep, and depends on a ventilator to survive. For Tomáš, the myth behind its name also becomes a way to think about his relationship with Zdenka and his unfaithfulness with Eve.

The medical condition

One of Tomáš’s young hospital patients has a condition unfamiliar to the medical profession. Awake, she can move her ribs and diaphragm and ventilate her lungs; once she falls asleep, however, she stops breathing. Without a ventilator to support her during sleep, she will die of asphyxiation. The narrative presents the condition as a grave physical reality, not simply as a metaphor: the device is a necessary condition of the child’s survival.

The account gives the illness the name Ondine's curse, while emphasizing how little the doctors understand it. Its defining division between waking and sleeping supplies the story with an arresting rule: breathing, ordinarily an involuntary basis of life, becomes contingent on consciousness. The child’s circumstance thus gives a clinical point of entry to a legend organized around the same division.

The legend of Ondine

In the story Tomáš knows, Ondine is an immortal water nymph who falls in love with Palemon, a mortal already promised to Berta. Palemon is willing to give up his existing betrothal for Ondine. But a nymph who bears a mortal’s child must surrender immortality, and Ondine fears the loss of her eternal youth and beauty. Palemon reassures her by promising that every waking breath will stand as proof of his love and faithfulness.

After they marry and have a child, Ondine becomes mortal, subject to age and decay. She later discovers Palemon with his former fiancée. In response to this betrayal, she returns to the river and invokes her remaining magic: Palemon will breathe while awake, but when he sleeps his breathing will cease. The curse makes his vow literal and turns a declaration of fidelity into the condition governing his life. The narrative identifies this punishment as the origin of the name given to Tomáš’s patient’s illness, while keeping the myth and the child’s medical condition distinct.

From myth to Tomáš’s relationships

Tomáš knows the legend through his patient’s illness. Zdenka knows it through Maurice Ravel’s piano piece Ondine. Early in their relationship, he asks her to show him how she dances. She initially refuses, saying that this part of her life is behind her; she allows herself only to teach dance twice a week in the gymnasium. Tomáš persists, and after work one day, when the others at the clinic have gone home, Zdenka brings out the gramophone she uses in her classes and plays the piece she danced for her final presentation at ballet school.

Their different routes to the same story make Ondine a point of connection between medical knowledge and Zdenka’s former life as a dancer. The myth is not merely an allusion introduced by Tomáš: it is already attached to music and movement in Zdenka’s own past. When he thinks of her as Ondine, he draws those associations into his understanding of their relationship, imagining her through the name’s beauty while also invoking the curse that gives it its darker force.

Betrayal, guilt, and the curse

Tomáš’s affair with Eve sharpens the legend’s relevance. He feels no less guilty because Eve is not jealous of Zdenka; what matters to him is the harm he believes the truth would cause Zdenka. He does not ask Zdenka whether she could accept his other relationship, because he believes the knowledge would destroy her. His fear echoes the myth’s betrayed Ondine, though the novel does not make the two situations identical: Tomáš identifies Zdenka with the figure who might be wounded by betrayal, while recognizing himself as the one risking the consequence.

Tomáš wonders why he betrays Zdenka and considers whether courting the curse might give meaning to his life. He is drawn not only to the myth’s beauty but to its frightening rule about breathing. He dwells on inspiration, respiration, and expiration as words that encompass birth, life, and death. In this way, the medical condition and the legend become instruments of reflection: the patient’s dependence on a ventilator gives concrete force to the life-and-death image, while the myth supplies Tomáš with a language for his own guilt and fear of discovery.

The curse therefore recurs across distinct registers: as a child’s dangerous medical condition, as the punishment in a story of broken faith, and as a figure through which Tomáš interprets his relationship with Zdenka. Its significance lies in that crossing, not in any claim that the child’s illness is caused by betrayal or that the myth explains its medicine. The narrative keeps the clinical mystery present even as Tomáš turns the name into a personal emblem, leaving breathing at once a bodily necessity and a measure of fidelity.