Thetis (Prophecy)
nymphThetis was the Nereid whose son was destined to surpass his father — a prophecy so threatening that Zeus and Poseidon married her off to a mortal.
The Myth
The prophecy about Thetis's son was the most consequential in Greek myth. Had Zeus or Poseidon fathered her child, that child would have overthrown the king of gods. They hastily married her to the mortal Peleus, producing Achilles — the greatest warrior, but mortal. Thetis tried to burn away or dip away his mortality. She warned him: a long, obscure life or a short, glorious one. She wept throughout the Iliad, knowing her son chose glory and death.
Parents
Nereus and Doris
Symbols
Fun Fact
The Thetis prophecy is the hidden engine of Greek mythology — it explains why the Trojan War happened to mortals instead of gods.
Words We Inherited
English words and phrases that trace back to this myth:
Explore Further
Thetis
nymphThetis was a sea nymph so powerful that both Zeus and Poseidon desired her — until a prophecy...
Achilles
heroThe greatest warrior in the Greek army at Troy, nearly invulnerable thanks to being dipped in the...
Nereus
godNereus was the ancient, benevolent sea god known as the Old Man of the Sea — truthful, wise,...
Peleus
heroKing of Phthia, Argonaut, and father of Achilles who wrestled the shape-shifting sea goddess Thetis...
Nereids
nymphThe fifty Nereids were daughters of Nereus — benevolent spirits of the calm sea who aided sailors...
Styx (Goddess)
nymphStyx was both a river and an Oceanid goddess — the first divine ally of Zeus in the Titanomachy,...
Poseidon
godLord of the seas and brother of Zeus. Poseidon's moods shaped the oceans — calm seas for those who...
Poseidon (Earth-Shaker)
godPoseidon was the god of the sea and earthquakes whose moods determined whether sailors lived or...
Poseidon Hippios
godAn epithet of Poseidon as lord of horses, reflecting his role as creator of the first horse and...
Trojan Horse
conceptThe hollow wooden horse used by the Greeks to infiltrate and destroy Troy. Devised by Odysseus, it...
Trojan War
conceptThe Trojan War was the central event of Greek mythology — a ten-year siege of Troy by a Greek...
Zeus
godSupreme ruler of the Olympian gods and lord of the sky. Zeus overthrew his father Kronos and...