Homer presents Thamyris as a Thracian singer whose fatal boast takes place at Dorion in Messenia. Later mythographers give him a fuller family, making him the son of Philammon and the nymph Argiope, and some traditions connect Philammon himself with Apollo. Those later genealogies should not be read back into Homer's compact account as if every source knew Thamyris as Apollo's grandson.

Later writers enlarged Thamyris' reputation as an exceptionally gifted singer, but claims that he invented particular genres of love song belong to late attribution rather than secure biography. The stable core is his musical excellence and the boast that he could defeat the Muses themselves.

In his youth he loved, and in his loving he was also first. The old mythographers say that Thamyris was the first man ever to burn with desire for his own sex, his heart kindled by the beauty of Hyacinthus, a youth so lovely that every teller agreed the world had never made a fairer. Some called Hyacinthus the son of Amyclas, the king of Sparta, and some made him the son of a Muse and a mortal king, but all agreed on his end: Apollo, the god of music and light, loved him above all mortals, and one day at the discus ground the god hurled the heavy disc high and the boy, running to mark the throw, was struck by it as it fell and died in Apollo's arms, and from his blood sprang the dark fragrant flower that still bears his name. For Thamyris the love was hopeless twice over, aimed at a youth who preferred a god, and then at a grave. The old compilers put the two facts side by side and let the reader feel the shape: the singer who could not win the beautiful boy went on, in his pain or his pride, to challenge the very goddesses of song.

He came at last to Dorion, a town of Messenia in the south-west of the Peloponnese, the great peninsula of southern Greece, and there the story turns dark. In the drinking hall, among the wine, Thamyris made the boast that destroyed him: he would win a singing contest even if the Muses themselves were his opponents, even if the nine daughters of aegis-bearing Zeus stood against him with their divine voices. It was a wager against the source of his own gift, and the Greeks who heard the story told it with a kind of frightened relish, because everyone in every hall knew the rule. Later tellers embroidered the wager: the Muses staked themselves, they said, promising the singer their favour if he won, and naming as his forfeit whatever they should choose if he lost. However the terms were set, the opponents accepted, and the contest was joined, a mortal throat against nine divine ones. No poem records what was sung on either side; the tradition preserves only the verdict. The Muses were not mocked, and the punishment they laid on the loser was not a fine and not exile but the dismantling of the man, gift by gift.

Homer says the Muses maimed Thamyris, took away his wondrous song and made him forget his minstrelsy. Later sources interpret the maiming as blindness and expand the punishment into the loss of sight and music. Some artistic and literary afterlives show the broken musician in the Underworld, but no early source securely gives him a long career as a wandering beggar or a documented place and manner of death after the contest.

He became, almost immediately, the standard warning. The Greeks and Romans told his story for a thousand years wherever excellence grew proud: the bard who challenged the Muses was the fixed example of the artist who mistakes a loan for an inheritance. He stands behind the whole later tradition of the blind singer, a figure the Greeks themselves could not leave alone: the Odyssey gives the Phaeacians a blind bard named Demodocus, whom a god has robbed of sight but endowed with song, the Muses' compensation for their cruelty to Thamyris in reverse, and legend made Homer himself blind, as though the highest gift and its punishment lived next door. And the beings who broke him never left the languages of the world: from their name come the words music and museum, the art and the house of the art, so that every orchestra tuning and every gallery opening still invokes, in a word their founders never heard, the nine goddesses of Dorion. The warning is not against excellence, which they rewarded, but against the next step, the step Thamyris took in the hall at Dorion: the moment a mortal counts his gift as his own property and calls the givers his equals. The Muses did not punish a bad singer. They punished an ungrateful one, which was a worse thing to be.

Thamyris remained a durable example of hubris in later writing and scholarship because his story makes artistic talent a gift that can be withdrawn. His name appears whenever ancient authors discuss the boundaries between mortal skill and divine authority. The safest modern retelling keeps that core without adding unsupported episodes to his life after the Muses' punishment.