This eight-line scene exists in the play to make a structural point. Caesar is deliberate. He has a written plan. He trusts his lieutenant to follow it without deviation. He knows that discipline in the decisive moment is what separates winners from losers. The historical Caesar Augustus was famous for this quality — the Romans contrasted his cold calculation favorably with Antony's passionate impulsivity. Shakespeare stages it as a theatrical juxtaposition: after the heated chaos of 3-7, where nobody agrees and Antony makes his decision on the basis of a challenge, Caesar arrives, gives two sentences of orders, and exits. The contrast tells the story before the battle begins.