International regimes, international treaties, international norms are observed not because of the goodness of anybody but because they bring benefits. If they don't, then the longevity of those agreements come into jeopardy.

I have disagreements with some and more agreements with others. But that doesn't mean I cannot listen to those I disagree with.

We hope that Saudi Arabia can come to terms with its neighbours, end the hostilities - which can only produce hatred in Yemen - and live peacefully with their neighbours. They cannot blame everything on Iran.

If we can ascertain and show to our people that the West is ready to deal with Iran on the basis of mutual respect and mutual interests and equal footing, then it will have an impact on almost every aspect of Iran's foreign policy behavior - and some aspects of Iran's domestic policy.

The United States wanted to send its trained rebel groups to Syria to fight ISIS. Out of twenty-five hundred rebels they had trained, only seventy accepted to go to Syria to fight ISIS. Everybody else wanted to go to Syria to fight the government. So you've got to wake up and smell the coffee... The rebel groups have not fired a shot against ISIS.

It is time for Iran and other stakeholders to begin to address the causes of tension in the wider Persian Gulf region. We need a sober assessment of the complex and intertwined realities here and consistent policies to deal with them. The fight against terror is a case in point.