CASSIUS: Mark Antony, so well beloved of Caesar, Should outlive Caesar. We shall find of him A shrewd contriver. And you know his means, If he improve them, may well stretch so far As to annoy us all; which to prevent, Let Antony and Caesar fall together. BRUTUS: Our course will seem too bloody, Caius Cassius, . . . Let’s be sacrificers but not butchers, Caius. . . . This shall make Our purpose necessary, and not envious; . . . And for Mark Antony, think not of him, For he can do no more than Caesar’s arm When Caesar’s head is off. What does this interaction reveal about Cassius’ motivations?