Foreign Minister Mohammad Javad Zarif says Ayatollah Ali Khamenei advised him not to shout during the talks, but to make his point with his smile. It seems the supreme leader got wind of the fact that Mr Javid raises his voice during meetings with US Secretary of State John Kerry, sometimes causing their bodyguards to peek into the room and check everything's alright, the Islamic Republic News Agency reports . "When I visited the supreme leader the next time, he asked: 'Why do you shout at meetings? Smile as you do, and say what you have to say'," Mr Zarif recounted to a group of students during a visit to a boys' school. Ayatollah Khamenei also told him to "speak with logic... don't argue", he says.