Iran’s President Hassan Rouhani said Thursday that radical talk from critics of the country’s nuclear deal with world powers was dangerous and he urged more, not less, diplomacy and dialogue.

Iran's President Hassan Rouhani said Thursday that radical talk from critics of the country's nuclear deal with world powers was dangerous and he urged more, not less, diplomacy and dialogue.

In a speech broadcast live from Tehran, Rouhani said the nuclear deal, finally implemented in January after more than two years of talks, showed "logic and argument can triumph over hard power and threats."

"Under radical thinking, there should never be cooperation with the IAEA or the United Nations," Rouhani said, referring to the International Atomic Energy Agency responsible for monitoring the deal.

"Radical thinking tells us not to trust anyone, not to trust neighbors or friends, but moderate thinking tells us... we should talk to the world and seek self-reliance at the same time.

"Being radical is disadvantageous to us everywhere. It creates the biggest danger for any society."

Rouhani has praised the accord, which defused a 13-year showdown with the West, as an example to be followed for forging "understanding and reconciliation" at home.

But he warned the economic opportunities opened up by the deal were "not permanent or ever-lasting."

"If, God forbid, a few people succeed and don't let us use this opportunity well, this opportunity will not be repeated," he said to loud applause, denouncing those who "sow fear and reap fear."

"Uttering hollow and tough words is not art," he said, as Iran prepares to marks its National Day of Nuclear Technology on Friday.