“You know the Iranian nation is in principle and on religious grounds against the nuclear weapon. Nuclear weapons only incur high costs and have no use. They do not bring power to a nation,” [Khamenei] said.
Chief Cleric Says Iran Doesn’t Seek Nuclear Arms, NYT, June 3, 2008
"We have no interest in building a nuclear weapon."
Interview with Iranian President Ahmadinejad, Spiegel, April 10, 2009
US Secretary of State Hillary Clinton said Wednesday she intends to explain to Iran it is not in its interest to acquire a nuclear weapon because it would spark a Middle East arms race.
Nuclear weapons are not in Iran’s interests: Clinton, AFP, May 21, 2009
But why does she think she needs to explain that?