Read the excerpt from act 5, scene 2, of Julius Caesar . [Alarum. Enter BRUTUS and MESSALA] BRUTUS: Ride, ride, Messala, ride, and give these bills Unto the legions on the other side. [Loud alarum] Let them set on at once, for I perceive But cold demeanour in Octavius’ wing, And sudden push gives them the overthrow. Ride, ride, Messala, let them all come down. [Exeunt] What does Shakespeare mean by the phrase "cold demeanour” as spoken by Brutus in this passage?