To have a hairy heart

To have a hairy heart is a dated but enduring expression in wizarding language for a witch or wizard who is cold or unfeeling. Its force comes from the tale behind it: a young man tries to separate himself from his heart to become superhuman, but the division instead marks his descent into inhumanity. The phrase turns that failed transformation into a compact description of emotional coldness.

Origin in the Tale

The expression recalls the young man who locks away his heart. As it slowly shrivels and grows hair, the change figures his own descent into beasthood. He becomes violent, takes what he wants by force, and dies trying to regain what is forever beyond his reach: a human heart. His fate gives the phrase its moral weight: the attempt to transcend human feeling leaves him unable to recover it.

The tale’s language draws a direct line between the condition of the heart and the character of its owner. The heart is not merely hidden; its deterioration accompanies the young man’s transformation, until the quest to become superhuman has rendered him inhuman. In everyday speech, the expression compresses that story into a judgment about emotional coldness.

Use and Examples

Though somewhat dated, the expression has passed into everyday wizarding language to describe an unfeeling witch or wizard. Its use is not confined to the tale: the narrator’s maiden aunt, Honoria, said that she had called off an engagement to a wizard in the Improper Use of Magic Office after discovering that he had a hairy heart. The anecdote presents the phrase as a reason to end a prospective relationship, while preserving the distinction between Honoria’s stated explanation and what was rumored about the discovery.

That rumor offered a different account: Honoria had supposedly found her former fiancé fondling Horklumps, which she found deeply shocking. The contrast gives the anecdote its comic turn, but does not settle which explanation was true. The expression’s meaning remains clear even within the joke: it is a familiar accusation of coldness, though in Honoria’s story its application is entangled with an eccentric and disputed episode.

Later Cultural Life

The phrase also appears in the title of the self-help book The Hairy Heart: A Guide to Wizards Who Won’t Commit, which more recently topped bestseller lists. The title carries the expression from a judgment of an unfeeling person into the language of relationship advice, linking the tale’s image of a lost human heart with difficulty committing. Its continued use in conversation and publishing shows how the story’s warning became a portable piece of wizarding vocabulary.