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Grand Ayatollah Hossein Ali Montazeri: "Mourning will actually strengthen the opposition."

In a SPIEGEL interview, Iranian Ayatollah Mohsen Kadivar, currently a visiting research professor at America's Duke University, discusses the recent death of opposition leader Hossein Ali Montazeri, the frustrations Iranians have with their regime and the future of the green movement and the prospect of an escalation.

SPIEGEL: Ayatollah Kadivar, what did Hossein Ali Montazeri mean to you, and what role did he play for the Iranian people?

Kadivar: He was my teacher, my spiritual guide, my father -- the most important person in my life. I studied as a young man...