The myth begins shortly after the birth of Hermes in a cave on Mount Cyllene. Displaying precocious intelligence, the infant god slips away to Pieria, where he steals a portion of the cattle belonging to his brother, the sun god Apollo. To avoid detection, Hermes cleverly disguises the tracks of the animals by forcing them to walk backward, a feat of ingenuity that highlights his role as the patron of tricksters and thieves.
Upon discovering the loss, Apollo tracks the thief to the cave, where he confronts the infant. Despite the god's anger, Hermes denies the act with charming audacity, leading to a divine dispute that eventually requires the intervention of their father, Zeus. The resolution of this conflict serves as a pivotal moment in the Olympian hierarchy, establishing the dynamic between the two brothers.
To appease Apollo and settle the debt, Hermes offers him a newly invented musical instrument, the lyre, which he constructed from a tortoise shell. This exchange not only resolves the theft but also cements the lyre's place as a sacred object associated with Apollo's musical domain, while simultaneously securing Hermes's position among the Olympian gods.
This narrative serves as an etiological myth, explaining the origins of the lyre and the unique personality of Hermes. It underscores the themes of divine rivalry, the power of negotiation, and the transition from infancy to godhood within the complex social structure of the Greek pantheon.