Source Verification: Odysseus and the Cyclops

Every claim below is either what a named ancient source attests, in its own line or section, or a point where the sources themselves disagree.

What the Sources Attest

Why did Odysseus tell Polyphemus his name was Nobody?

It was a defense planned in advance: Odysseus reasoned that if the trick worked and he had to hurt the Cyclops, Polyphemus would need to call for help by name, and "Nobody is hurting me" would send the other Cyclopes away thinking nothing was wrong. The plan worked exactly as intended, buying Odysseus and his men the time they needed to escape the cave.

Source: Homer, Odyssey 9.105–9.566

Why did Odysseus shout his real name after escaping?

Pride, by Homer's own account: unable to resist claiming credit for the trick, Odysseus called back to the blinded Polyphemus and announced his real name and home, undoing the safety the false name had bought him. It is the poem's clearest example of Odysseus's cleverness curdling into recklessness, since it is this boast that lets Polyphemus name him to Poseidon and call down the curse that shapes the rest of the voyage.

Source: Homer, Odyssey 9.105–9.566

Why did Poseidon become Odysseus's enemy?

Polyphemus was Poseidon's son, and once he knew his blinder's name, he prayed to his father either to kill Odysseus or, failing that, to see him arrive home late, alone, in another man's ship, and find trouble waiting when he got there. Poseidon could not defy fate to kill Odysseus outright, so the rest of his wandering, storm after storm and the loss of his entire crew, plays out the second half of that prayer instead.

Source: Homer, Odyssey 9.105–9.566

Why does Homer make hospitality the center of the Cyclops episode?

Guest-friendship, xenia, was a real social and religious obligation in the world the poem describes, protected by Zeus himself as god of strangers. Odysseus approaches the cave expecting the hospitality any traveler was owed; Polyphemus instead eats his guests, which the poem marks as a violation of a near-sacred rule rather than an isolated act of monstrous violence, making the Cyclops a moral outlier as much as a physical one.

Source: Homer, Odyssey 9.105–9.566

Is the loving, lovesick Cyclops of later poetry the same figure as Homer's Polyphemus?

Same name and parentage, very different character. Later Greek and Roman poets, especially in the story of his hopeless love for the sea-nymph Galatea, portray Polyphemus as a clumsy, self-pitying suitor rather than a man-eating threat, closer to a figure of comedy than of horror. Homer's Odyssey has no trace of the Galatea material; it belongs to a separate, later strand of tradition about the same monster.

Source: Ovid, Metamorphoses 13.738–897

Where Accounts Differ

Homer's monster vs. later poetry's lovesick Cyclops

Homer's Polyphemus is a dangerous, man-eating threat; Ovid's later portrait of the same figure, pining for the nymph Galatea, is closer to comedy than horror. The two traditions are not reconciled anywhere in the surviving sources.

Sources

Primary sources

Homer, Odyssey 9.105–9.566
Ovid, Metamorphoses 13.738–897