Commentators have noted that Thorin is Old Norse both in name and character, being surly, illiberal,[1] independent, proud, aristocratic, and like all Dwarves greedy for gold.
Tolkien was a Roman Catholic; from a Christian perspective, Thorin exemplifies the deadly sin of avarice, but is able to free himself from it at the time of his death.
"Long ago in my grandfather Thror's time our family was driven out of the far North, and came back with all their wealth and their tools to this Mountain on the map."
The wizard Gandalf had advised Thorin and the other dwarves to hire Bilbo as a burglar to help them steal their treasure back from the dragon Smaug.
[T 4] Bilbo, invisible with his magic ring, evaded capture and organised the company's escape, which they accomplished by floating in barrels out of the Wood-elves' fastness.
[T 6] Seeing that Smaug was not there, the Dwarves reclaimed some of the treasure; Thorin gave Bilbo "a small coat of mail" made of mithril as the first installment of the payment due for his services.
[T 9] Faced with demands from Thranduil the Elvenking and Bard for a fair share of the treasure to be distributed to the Wood-elves and the men of Lake-town, Thorin refused to acknowledge their right to any of the hoard.
Gandalf feared that Sauron could use Smaug as a weapon, and was concerned that Thorin's pride and quick temper would ruin the mission to destroy the dragon.
[T 13] Tolkien adopted Thorin's names from the Dvergatal, the list of Dwarves, in the Old Norse poem "Völuspá", which is part of the Poetic Edda.
[6] Dwarfs in Germanic folklore are skilled in metalwork, including making weapons, ships, rings and jewellery; they are knowledgeable, strong, and turn to stone in sunlight.
They are characterised as having a strong association with gold, mining, wealth, living underneath mountains, and being long-lived, ungrateful, and getting into arguments about payment.
[7][8] Shippey writes that in chapters 6–8 of The Hobbit, Tolkien explores "with delight that surly, illiberal independence often the distinguishing mark of Old Norse heroes".
In his view, Smaug is evil and lets avarice destroy him, whereas Thorin, sharing the general weakness of Dwarves for this particular vice, nevertheless has sufficient good will to free himself of it at the time of his death.
[11] Bassham and Bronson compare Thorin's deathbed "conversion" from his greed and pride, as he reconciles himself with Bilbo, to Ebenezer Scrooge's "big moral transformation" from grumpy miserliness to generosity and cheerfulness in Charles Dickens's 1843 novella A Christmas Carol.
[15] The film adaptation adds to Thorin's quest an arch-enemy in the form of the villainous orc leader Azog,[16] as well as a history of enmity with Thranduil, which began with a dispute between his grandfather Thrór and the Elvenking over the White Gems of Lasgalen.
[17][18] In his review, Erik Kain from Forbes wrote that Thorin stood out as a remarkable character with shades of dark and light, at once heroic and stubborn to a fault.