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The conspirators gather around Caesar and he sees his trusted friend Brutus among them. Stunned that Brutus is among his assassins, Caesar cries out, "and you too, Brutus?" This famous line is important because it sets Brutus apart from the other conspirators. There is no doubt that Brutus's self-serving and ambitious accomplices have committed an indefensible act, but with Caesar's final utterance we recognize that the self-sacrificing and noble Brutus has perpetrated the same heinous crime – his motivation is rendered immaterial. For this moment, Brutus the idealist becomes Brutus the murderer.
What is the significance of Caesar's dying words, "Et tu, Brute? Then fall, Caesar!"?