Darius did, however, ask who the Athenians
were, and after receiving the answer, he called
for his bow. This he took and, placing an arrow
on it, shot it into the sky, praying as he sent
it aloft, “O Zeus, grant me vengeance on the
Athenians."
Then he ordered one of his servants to say
to him three times whenever dinner was set
before him, “Master, remember the Athenians."

What does this description of Darius I reveal about him?