The model story for Telemachus. Agamemnon came home from Troy and was murdered at his own table by Aegisthus, his wife’s lover. Years later his son Orestes grew up, came back, and killed the man who had killed his father. The gods approved. Athena tells Telemachus the story early — Have you heard what Orestes did? — and tells it again, and again. The point is not subtle. Your father may be dead. You are a king’s son in a hall full of men who are eating your inheritance. There is a script for this. Agamemnon himself, in the underworld, repeats it: be a different kind of son than I was a husband. The parallel is the lever that turns the boy into someone who can stand up in the assembly.
The Orestes Parallel
Agamemnon was murdered by his wife's lover. His son Orestes grew up and killed the lover. The story Athena keeps holding up to Telemachus.