Batman #442 (volume 1)

"Batman, if they think they can kill someone like Robin-- who are they going to hunt down next? I don't know why you decided to wear that costume-- but it makes you a symbol. Just as Robin was a symbol. Or Superman, or Nightwing, or the policeman who wears his uniform. And this isn't just a symbol of the law, it's a symbol of justice. When one policeman is killed, others take his place because justice can't be stopped. And Batman needs a Robin. No matter what he thinks he wants."

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