Thetis

Thetis appears in Book I when Achilles calls her from the shore. She rises from the sea, hears his grievance, and agrees to help, even though she knows that Zeus’s favour will shorten her son’s life. She waits twelve days for the gods to return to Olympus and then clasps Zeus’s knees in supplication.

Her power is real but limited. She can persuade Zeus to honour Achilles, and she can commission armour from Hephaestus, but she cannot prevent his death. The poem’s pathos depends on this: the most divine mother in the story is also the most helpless.

In Book XVIII Thetis comes to Achilles as he mourns Patroclus and warns him that his own death will follow Hector’s. She goes to Hephaestus and asks for new armour, and the shield he makes contains the whole world—city and countryside, war and peace, agriculture and dance. It is a gift from a mother who cannot save her son, and an image of everything he will not live to enjoy.

The Iliad ends without her son’s death, but Thetis has already told him it is near. She is one of the poem’s clearest figures of divine knowledge without divine power.