"Did this in Caesar seem ambitious"(3.2.64) This mode of persuasion was used to make people believe that Caesar wasn't an ambitious person like Brutus says.
"You all did love him once, not without cause: What cause withholds you then, to mourn for him?"(3.2.64) This mode of persuasion was effective because it has an emotional appeal to the people of Rome. It says how they loved him before, and they still should now.
"I thrice presented him a kingly crown, Which he thrice refuse"(3.2.64). This mode of persuasion is effective because it is a fact that Caesar refused the crown 3 times. People cannot argue against this .