Thetis
(17) Thetis
Thetis is a Nereid, a sea deity of Greek mythology, daughter of Nereus and mother of the hero Achilles. She plays a central role in Homer's Iliad, interceding with the gods on behalf of her son. An embodiment of divine maternal power, she stands at the heart of Greece's great epic narratives.
Key Facts
- Thetis is one of the fifty Nereids, daughters of the sea god Nereus
- She is the mother of Achilles, the central hero of Homer's Iliad (8th century BCE)
- According to myth, she dipped Achilles in the river Styx to make him invulnerable, holding him by the heel
- She intercedes with Zeus and Hephaestus to help her son during the Trojan War
- Her union with the mortal Peleus, imposed by the gods, is the origin of the wedding that triggered the Trojan War
Works & Achievements
The founding epic of Western literature, in which Thetis plays a pivotal role: she intercedes with Zeus, comforts Achilles, and has a divine suit of armor forged for him. Her interventions shape several essential books of the poem.
A cosmogonic poem presenting the genealogy of the Greek gods. Hesiod mentions Thetis among the fifty Nereids, daughters of Nereus, placing her within the divine hierarchy of archaic Greek mythology.
Triumphal odes in which Pindar recounts the episode of Thetis's marriage and the oracle of Themis. These texts attest to the central place of Thetis in classical Greek mythology.
The Roman poet retells and expands the episode of the wedding of Thetis and Peleus, including the Nereid's resistance and her shape-shifting nature. This Latin version transmitted Greek mythology to Roman and later medieval culture.
An unfinished Latin epic centered on the childhood and youth of Achilles, in which Thetis plays a dominant role. Statius develops in particular the episode where she disguises her son as a girl on the island of Scyros to keep him from the war.
Anecdotes
Thetis was so beautiful that both Zeus and Poseidon, enamored of her, competed for her hand. But an oracle revealed that Thetis's son would be mightier than his father. Terrified at the prospect of siring a rival, the two Olympian gods gave up their pursuit and forced her to marry the mortal Peleus, king of Phthia.
At the wedding of Thetis and Peleus, all the gods were invited — except Eris, goddess of Discord. Insulted, she threw a golden apple inscribed 'To the fairest' among the guests. The rivalry this sparked between Hera, Athena, and Aphrodite led to the Judgment of Paris and, in turn, to the Trojan War.
Knowing that Achilles would die if he went to Troy, Thetis tried to shield him from his fate. In some versions of the myth, she dipped him in the Styx to make him invulnerable, holding him by the heel — the one spot that remained mortal. In other traditions, she dressed him as a girl and hid him on the island of Skyros to keep him away from the war.
In Book I of the Iliad, Achilles, humiliated by Agamemnon, withdraws from battle. Thetis ascends to Olympus and clasps Zeus by the chin in a gesture of supplication, asking him to favor the Trojans so that the Greeks might come to recognize her son's worth. Zeus, moved, bows his head in assent — a solemn and irrevocable gesture.
After the death of Patroclus, Thetis rises from the depths of the sea and travels to Olympus to commission a divine suit of armor for Achilles from Hephaestus. The celestial smith, grateful to Thetis for having once sheltered him after Hera cast him from the sky, works through the night and forges an enormous shield adorned with scenes of the cosmos and the mortal world — a masterpiece of divine craftsmanship.
Primary Sources
Silver-footed Thetis, sitting in the depths of the sea beside her ancient father, heard his cries and rose swiftly from the grey water like a mist, sat before him as he wept, stroked him gently with her hand, and said: 'My child, why do you weep?'
Silver-footed Thetis came to Hephaestus. She found him sweating and moving busily among his bellows; he was forging twenty tripods. He welcomed her with joy and said: 'Why have you come, honored goddess? Tell me what you desire; I will do everything in my power.'
Nereus fathered fifty daughters, among them the divine Thetis. They dwell in the depths of the sea and bestow their blessings upon mortals.
Zeus and glorious Poseidon both sought Thetis as a bride. But Themis revealed to them that fate decreed this goddess would bear a son mightier than his father.
Proteus said to Thetis: 'Goddess of the seas, do not refuse the bonds of marriage. Whatever son you bear shall be greater than you; he shall surpass his father in glory and in valor.'
Key Places
The permanent home of Thetis and her father Nereus, this underwater palace is where she emerges to join the world of mortals and gods. It is here that she receives Achilles' lamentations and decides to intervene on his behalf.
The mythical site of the wedding of Thetis and Peleus, celebrated in the presence of all the gods of Olympus. It is on this wooded mountain range in Thessaly that the centaur Chiron later raised the young Achilles.
The abode of the Greek gods, which Thetis ascends on several occasions to intercede with Zeus on Achilles' behalf. Her access to this sacred peak illustrates her exceptional status as a sea deity respected by the Olympians.
The kingdom of the mortal Peleus, husband of Thetis, and the birthplace of Achilles. It is from here that their son departs for the Trojan War, knowing, as his mother does, that he will not return alive.
The setting of Achilles' great deeds and his death. Thetis is present there in spirit and in action — bringing the divine armor, consoling her son after the death of Patroclus, and watching over his body.
A volcanic island in the Aegean Sea associated with the divine smith Hephaestus. It is here that Thetis goes to commission Achilles' armor, drawing on the debt of gratitude owed by the god whom she had once sheltered after his fall from Olympus.