One day, Achilles lost his bosom friend Patroclus in the war by Hector, because Patroclus was wearing Achilles' armor and his enemies thought he was Achilles.
Achilles was devastated. His calm but brave friend was very dear to him and was like his other half.
Grief-stricken, he refused to taste any bread or wine. He wanted to show solidarity to his slain friend who met his fateful day instead of him.
His comrades kept telling Achilles:
"War can't be won with an empty stomach, people need food to survive!"
But the persistent advice of his comrades didn't convince him. On the contrary. Achilles rebels and promises to himself: he would not touch food by any means.
But high from Mount Olympus, Zeus is supervising Achilles because he knows that Achilles is a very brave man.
And he knows that if hunger strikes, the knees of people begin to tremble.
So Zeus sents his daughter Athena, the goddess of wisdom, to empower Achilles.
The goddess uses her broad wings to arrive as fast as she can and pours ambrosia and nectar- the divine food of the gods- to Achilles' chest.
This element gives him the strength to fight all day without food, but does not make him immortal.
Later on, Achilles would finally take revenge by killing Hector as well as many other Trojans. Then he buried Patroclus with honors and organized funerary games in loving memory.