When the heralds of Agamemnon had led Briseis away, Achilles stripped off his armour, for not again would he fight in the Trojan War. Down to the seashore he went alone to weep for the loss of Briseis the Faircheeked.
As he wept he called aloud to his mother Thetis. From the depths of the sea she heard his cry, and swift on a wave she reached the shore. Soon she was by the side of her son, and taking his hand, as when he was a boy, she asked, ‘My child, why weepest thou?’
Then Achilles told how Agamemnon had taken from him Briseis, whom he loved.
‘Go to the palace of Zeus,’ he entreated her, ‘and beseech Zeus to give me honour before the hosts of the Greeks. Let him grant victory to the Trojans until the king sends to Achilles to beg for his help in the battle.’
So Thetis, for the sake of her dear son, hastened to Olympus, and bending at the knee of Zeus she besought the god to avenge the wrong done to Achilles.
At first Zeus, the Cloud-gatherer, was silent, as though he heard her not. ‘Give me now thy promise,’ urged Thetis, ‘and confirm it with a nod or else deny me.’
Then the god nodded, and thereat Olympus shook to its foundations. So Thetis knew that she had found favour in the eyes of Zeus, and leaving the palace of the gods she plunged deep into the sea.
Zeus hastened to fulfil his promise, and sent to Agamemnon a ‘baneful dream.’
As the king dreamed, he thought he heard Zeus bid him go forth to battle against the Trojans, for he would surely take the city. But in this Zeus deceived the king.
When Agamemnon awoke in the morning he was glad, for now he hoped to win great honour among his warriors. Quickly he armed himself for battle, throwing a great cloak over his tunic, and slinging his sword, studded with silver, over his shoulder. In his right hand he bore the sceptre of his sires, the sign of his lordship over all the great hosts of Hellas.