The Greek Sphinx was a monster of the mind as much as the body — a creature with the face of a woman, the body of a lion, and the wings of an eagle, who killed not with claws alone but with a riddle. She is the guardian of the most famous question in mythology, and the architect of one of its greatest tragedies.
The Terror of Thebes
A child of the monster-brood (daughter of Typhon and Echidna, or of Orthrus), the Sphinx settled on a rock outside the city of Thebes and strangled or devoured anyone who could not answer her riddle. She held the whole city hostage to a question. (Her name, fittingly, derives from a Greek word meaning “to squeeze” or “strangle.”)
The Riddle
Her famous riddle ran: “What walks on four legs in the morning, two legs at noon, and three legs in the evening?” Traveller after traveller failed and died. Then came Oedipus, fleeing a prophecy of his own, who gave the answer: Man — who crawls on all fours as a baby, walks on two legs as an adult, and leans on a staff in old age. The answer was humanity itself, and our journey through a single lifetime.
The Monster Undone by Truth
When her riddle was solved, the Sphinx was destroyed — in most versions she threw herself from her rock to her death, undone by the one thing she could not survive: being answered. Oedipus was hailed as the saviour of Thebes and given the throne and the widowed queen as his reward — not knowing that, in escaping one fate, he had walked straight into a far darker one.
The Question That Outlives the Monster
The Greek Sphinx endures as the embodiment of the deadly riddle, the test of wits at the gate. (She is distinct from the older, benevolent Egyptian Sphinx — the Greeks made theirs female, winged, and murderous.) Her legacy is the idea that has echoed through philosophy ever since: that the answer to the riddle of existence is, simply and profoundly, ourselves.
The deadliest monster in Thebes was not a beast at all, but a question — and the answer was always us.