The teacher holds up a hand in a theatrical manner, and says, ""The fault, dear Brutus, is not in our stars, But in ourselves, that we are underlings." the Bard himself, Act 1, Scene 2, Julius Caesar."
Art looks a bit blank, and the teacher looks disappointed. "It refers to a quote that means, in effect, that it is not in the Stars to hold our destinies, but in ourselves."
"Well that's just silly. Of course we need to look to the stars!" Art argues back.