The greatest hero of Greek mythology began his most famous exploits as a penance for a terrible crime. Before Heracles ever wrestled the Nemean Lion or cleaned the Augean stables, he killed his own children — and in some versions his wife — in a fit of madness sent by the goddess Hera. The Twelve Labors were the atonement.
This dark episode, often omitted from children’s versions of the myth, is essential to understanding Heracles. He is not simply a strongman who performs amazing feats. He is a figure of enormous power who is also enormously vulnerable: to the jealousy of the gods, to his own violent nature, and to suffering beyond anything a mortal should bear. The madness shows the hero at his lowest, and it was the ancient Greeks’ most searching exploration of what heroic strength is for.
Hera’s Hatred
Heracles was the son of Zeus and a mortal woman, Alcmene, whom Zeus seduced by taking the form of her husband Amphitryon. Zeus’s wife Hera hated the child from before his birth. She delayed his birth so that his cousin Eurystheus would be born first and inherit the kingship of Mycenae that Zeus had intended for Heracles. She sent two serpents to kill him in his cradle — and the infant Heracles strangled them, one in each hand.
His very name — Herakles, “glory of Hera” — may have been an attempt to appease the goddess. It did not work. Her persecution followed him throughout his life, and the madness was its cruellest expression.
Heracles in Thebes
As a young man, Heracles lived in Thebes, where his mother and stepfather had settled. He freed the city from paying tribute to the neighbouring Minyans of Orchomenus, and in gratitude King Creon of Thebes gave him his daughter Megara in marriage. They had several children — the number varies from two to eight in different sources, most often three sons.
For a time, Heracles seemed to have everything: fame, a royal wife, and a family.
The Madness
Then Hera struck. She sent Lyssa, the spirit of madness and rage, to cloud his mind. In his delusion Heracles believed that his own children were the children of his enemy Eurystheus, or that they were enemies attacking him. He shot them with his arrows or threw them into a fire. In several versions he also killed Megara; in others she survived, and Heracles later gave her in marriage to his nephew and companion Iolaus, unable to bear the sight of her.
When the madness lifted and Heracles saw what he had done, he was devastated. He shut himself away in the darkness and considered killing himself.
The Oracle and the Labors
Seeking purification, Heracles went to the oracle of Apollo at Delphi. The Pythia, the priestess of the oracle, told him that to atone for his crime he must go to Tiryns and serve his cousin King Eurystheus for twelve years, performing whatever tasks the king demanded. If he succeeded, he would be granted immortality. (It was the Pythia, according to some sources, who first gave him the name Heracles; before that he had been called Alcides, after his grandfather.)
This is the origin of the Twelve Labors of Heracles. The humiliation was part of the penance: the greatest hero alive had to take orders from a cowardly, inferior man — the very man whose birth Hera had arranged to rob him of his inheritance. Eurystheus was so frightened of his cousin that he hid in a bronze jar buried in the ground whenever Heracles returned with a monster, and gave his orders through a herald.
Euripides’s Heracles
The most profound treatment of the madness is Euripides’s tragedy Heracles (sometimes called Hercules Furens, “Heracles Mad”), first performed around 416 BCE. Euripides radically rearranged the traditional order of events: in his play, the madness comes after the Labors, not before.
The play opens with Heracles absent, having descended into the underworld to fetch Cerberus, his final labor. In his absence a usurper named Lycus has seized Thebes and is about to execute Heracles’s wife Megara, his children, and his aged stepfather Amphitryon. At the last moment Heracles returns and kills Lycus. The family is saved, and the chorus sings in triumph.
Then, in one of the most shocking reversals in Greek drama, the goddesses Iris and Lyssa appear above the palace. Lyssa herself is reluctant — she protests that Heracles has done nothing to deserve this — but Hera’s command must be obeyed. Heracles goes mad in the middle of a purification sacrifice and kills Megara and the children, believing them to be the family of Eurystheus. A messenger’s speech describes the horror in detail. Only the intervention of Athena, who strikes him unconscious with a stone, saves Amphitryon.
By placing the madness after the Labors, Euripides makes it meaningless as punishment. Heracles has done everything right. His suffering is not a penance; it is simply what the gods have done to him.
”I Will Endure”
The final part of the play is its heart. Heracles wakes, bound to a pillar among the bodies of his family. When he understands what has happened, he resolves to kill himself.
His friend Theseus, whom Heracles rescued from the underworld, arrives. Theseus refuses to let him die. He offers Heracles a home in Athens, purification, and honour. He argues that even the gods endure misfortune and go on living.
Heracles’s reply is remarkable. He rejects the stories of the gods’ crimes: “I do not believe the gods commit adultery or bind each other in chains… a god, if he is truly a god, lacks nothing. These are the miserable tales of poets.” Then he makes his decision. Suicide, he realizes, would be cowardice. “I will endure life.” He leaves for Athens leaning on Theseus’s arm, “like a small boat towed behind a ship.”
The ending transforms the meaning of heroism. The greatest feat of Heracles is not killing monsters. It is choosing to go on living after an unbearable loss — and accepting help from a friend.
Seneca’s Hercules Furens
The Roman philosopher Seneca wrote his own version, Hercules Furens, in the first century CE. Seneca, a Stoic, portrays the madness as something that grows out of Heracles’s own excessive nature — his boundless ambition, his pride at conquering the underworld, his wish to storm heaven itself. In Seneca’s play, the madness is less an attack from outside than an expression of the hero’s own violence. It is a darker and more psychological reading.
Other Violent Episodes
The killing of his children was not the only act of violence in Heracles’s life. As a boy he killed his music teacher Linus with a lyre when the teacher struck him. Later, in another fit of madness, he threw his friend Iphitus from the walls of Tiryns, and had to serve the Lydian queen Omphale as a slave in penance, spinning wool dressed in women’s clothes while she wore his lion skin. His death, poisoned by the blood of the centaur Nessus, was itself the result of a jealous misunderstanding (see The Death of Heracles).
Interpretations
The madness of Heracles has been read in many ways. Ancient medical writers linked his rages to epilepsy, which the Greeks called “the sacred disease” and sometimes “the Heraclean disease.” Modern readers have seen in him a portrait of a soldier who brings violence home: a man trained to kill who cannot always tell friend from enemy. Some productions of Euripides’s play have been staged for veterans and connected with post-traumatic stress.
Most of all, the story reminds us that in Greek myth, the greatest strength brings no protection against suffering. Heracles could defeat every monster in the world except the one within, and the one sent by the gods.
Last reviewed: September 2026.