In the act, Cassius succeeds in manipulating Brutus by creating fabricated letters by Roman citizens calling for Brutus to save them from Caesar. Once he is convinced that Caesar is a plight to the Roman people, Brutus only then decides to aid Caius Cassius in assassinating Caesar. Through these events, Brutus displays remarkable selflessness and dedication to the well-being of Rome. Once the conspiracy against Caesar succeeds, Brutus again exhibits honor by allowing a close friend of Caesar, Mark Antony, to speak at Caesar’s funeral. Even after killing the most powerful man in Rome, Brutus still demonstrates a trusting nature by allowing Antony to speak to the Roman people.
Moreover, in Act IV of the play, Brutus maintains his integrity by criticizing Cassius’s corruption as the general of a Roman legion:
Brutus: Let me tell you, Cassius, you yourself
Are much condemn'd to have an itching palm;
To sell and mart your offices for