In act III, scene 2, an angry and grieving Antony gives a speech to the people in which he repeatedly calls Brutus an "honorable man." His tone is sarcastic: he means the opposite of what he says. He is trying to pour ridicule on Brutus's own claim that he is a man of honor who killed Julius Caesar for the good of Rome. Antony's repetition of the word "honorable" makes it sound false and hollow. By speaking of Brutus with such sarcasm, Antony turns the mob against him.
By act V, scene 5, Antony's view of Brutus has changed. When he finds the corpse of Brutus, who has committed suicide in a courageous way, Antony gives a stirring speech in which he calls Brutus, with no irony or sarcasm, "the noblest Roman of them all." He states that Brutus was the only one of the conspirators who participated in Caesar's assassination for the good of Rome, rather than out of jealousy of Caesar. He states that Brutus was "gentle" and ends with the words: “'This was a man.'”
Octavius also reveals a high opinion of Brutus in Act V, scene 5. Evidence of this is his willingness to take on all of Brutus' soldiers. This shows that he assumes that anyone who followed Brutus was a good and noble man. Octavius states:
All that served Brutus, I will entertain [accept] them.
Octavius also states that Brutus will have an honorable burial, showing his respect for this opponent:
With all respect and rites of burial.
Within my tent his bones tonight shall lie
Most like a soldier, ordered honorably.