In Act 5, Scene 2 of Shakespeare's "Julius Caesar," Cassius immediately begins to express his concerns about the battle and the strategic decisions being made. He is worried about the position of their army and the potential dangers they face.
Brutus wants Cassius to stop because he believes they should not engage in a debate about their tactics at such a critical moment. Brutus is focused on maintaining morale and unity among their forces as they prepare for battle against Antony and Octavius. He understands that showing dissent or division could undermine their position and cause further issues among the troops. Brutus seeks to keep their spirits high and their focus on the fight ahead rather than getting bogged down in conflict between the leaders.