Three is the Magic Number: Trios and Trinities in Harry Potter

Curator's Note

The past and the present and the future.

Faith and hope and charity.

The heart and the brain and the body

give you three as a magic number.

- Bob Dorough, Schoolhouse Rock (1973)


In Harry Potter and the Half-Blood Prince, a young Tom Riddle asks Horace Slughorn, “Can you only split your soul once? Wouldn’t it be better, make you stronger, to have your soul in more pieces? I mean, for instance, isn’t seven the most powerfully magical number, wouldn’t seven-?” (Rowling, 466). Rowling herself answers this last question repeatedly throughout the series – a resounding “No.” Seven is not the most powerfully magical number. In the Potterverse, as in many other places in literature and mythology, the most powerfully magical number is three.

For example, Greek mythology is full of references to threes. The Moirae (or The Fates) were three sisters that held the thread of life of every mortal; Clotho spun the thread, Lachesis measured it, and Atropos cut it. The sisters represented the three phases of life: birth, aging and death. Similarly, the Musai (or The Muses) were made up of nine (i.e. three times three) goddesses: Euterpe (music), Polyhymnia (the sacred), Calliope (poetry), Terpsichore (dancing), Clio (history), Erato (lyric), Thalia (comedy), Melpomene (tragedy) and Urania (astronomy) – each lending their inspiration to a form of art significant to the Greeks (interestingly, originally, there were only three Muses: Aoide - song, Melete – practice, and Mneme - memory). Of course, moving into the Christian era, the Holy Trinity emerged as primary: the Father, the Son and the Holy Spirit, representing, in turn, Power, Love and Knowledge.

In many major and minor ways, Rowling continually returns to the number three as symbolic of what might be called “perfect balance.” And, at the very core, a trinity of triads are central to the story itself: the three Unforgivable Curses (Crucio, Imperio and Avada Kedavra), the three Deathly Hallows (the Resurrection Stone, the Elder Wand and the Invisibility Cloak), and the most important of all, the Trio (Harry, Hermione and Ron). In each, we find similar elements: power, love and knowledge. The power the Elder Wand, the ability to remove power with Crucio, the physical power of Harry Potter. The ability to return loved ones to life with the Resurrection Stone, to end the life of other’s loved ones with Avada Kedavra, the emotionality and heart of Ron Weasley. The knowledge one can obtain (and the wisdom of passive resistance) through use of the Invisibility Cloak, the control over the knowledge of others with Imperio, the brainpower and logic of Hermione Granger. In fact, I have argued in my own work quite strenuously that Harry Potter isn't even the main protagonist of the series; the protagonist is a classic trinity structure: hero, anti-hero and heroine, with Harry, Ron and Hermione filling those respective roles. None of the three can achieve without the other two; they are utterly symbiotic. 

In each triad within the trinity of power in the Potterverse, each element is just as powerful as the other two, but specialized and unique – imbued with a particular locus of power rather exclusive to it. What those loci are and where they lie is, of course, open to interpretation.



Thank you, Christopher, for rounding out our Harry Potter week with such an insightful post.  Your argument is compelling, and thinking through Harry Potter in terms of threes provides a unique way of making sense of the narrative.

What do you make of the relationship between threes and sevens within the series?  You claim that three is the most magical number, but you also mention that sevens play an important role: seven horcruxes and seven books.  This feeds into a broader question I have about how you think myth and archetypes fit into Rowling's construction of the narrative.  There probably isn't space here for you to answer this broad question, but I'm curious to hear what you think about the "deeper" mythic structures in the series.

That is a really interesting question, and one definitely not to be overlooked. Seven is still also a very important mythological number, from the seven Pleiades in Greek mythology (the seven daughters of Atlas) to the seven scorpion that protected Isis from Seth's wrath in the Egyptian myth to our own modern seven myths, like the seven Wonders of the Ancient World (and "lucky number seven"). 

You're right in that this is a much, much larger question. I guess a short response would be that Rowling has a degree in Classics, and perhaps I am giving her a bit too much credit for intentionality, but I would like to think this juxtaposition between the mythological sevens and the trinity/trio/triad structures are purposeful. Many of her inclusions are archetypical (the name Hermione, for example, linking the character back through the sister of Helen of Troy and the biblical Hermione of Ephesus, both strong female figures of incredible character).  

While some of the threes and sevens, for example, may be simply coincidental, I have to believe that, based on her frankly masterful weaving of other types of myth throughout the series, she knew what she was doing. From her knowledge of mythological creatures to her weaving in of mythological figures like Nicholas Flamel to the way she uses names (Merope, for example, was one of the above mentioned Pleiades; Remus was the son of Mars, the Roman god of war and Lupin is a shortened version of Lupine, or "related to wolves" and phonetically reminiscent of canis lupus, the scientific name for wolves.), there's just too much there to ignore the mythological roots. 

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