Before Brutus began his speech, the third citizen says: "The noble Brutus is ascended: silence!" This reaction from the third citizen reflects the fact that Brutus is a significant figure and reflects also their eagerness to listen to Brutus' statement for Caesar's murder.
Brutus begins by addressing the crowds as "Romans, countrymen and lovers!" This helps him appear very courteous. In line 18, Shakespeare uses a chiastic structure "believe me for mine honour and have respect to mine honour, that you may believe" to swing the audience's support towards Brutus. Using a chiasm (repeating words in a different way) makes Brutus' words more emphatic.
From line 22 onwards Brutus is explaining his reasons for killing Caesar. Brutus uses memorable sentences such as: "Not that I loved Caesar less, but that I loved Rome more." Here Brutus is stating that he did indeed care about Caesar. However, he was prepared to sacrifice Caesar's life for the benefit of Roman citizens.
Brutus maintains a consistent pattern where he presents Caesar's action and then his own reaction: "As Caesar loved me, I weep for him; as he was fortunate, I…