Wheels are rolling for the talks scheduled on Saturday between Iran and six world powers over Tehran's nuclear program.

The talks, which come after over a year of impasse, offer a precious chance to rebuild trust among parties concerned and to put in motion a sustained dialogue process toward resolving Iran's nuclear issue.

Nearly all major global players hailed the positive progress when European Union foreign affairs chief Catherine Ashton announced in March that the five permanent members of the UN Security Council plus Germany (P5+1) had accepted Iran's offer to resume the stalled talks.

The hard-won agreement to return to the negotiating table has been viewed as a blessing to regional security amid ever mounting tensions resulting from harsh rhetoric, announcements of tightening sanctions or threats of using force.

To put a proper end to Iran's nuclear issue, all parties concerned should, first of all, refrain from provocative actions and cherish every chance to rebuild the much-needed trust among them.

For Iran, who has long held that its nuclear program is for civilian use only, it needs to make more efforts to convince the international community of its good faith.

As for Western countries, which have kept slapping sanctions on Iran in an attempt to pressure the country into dropping the alleged development of nuclear weapons, they should realize that unilateral sanctions could not, and can not, force Iran to give in but inflame animosities and trigger tit-for-tat actions.

Iran recently stopped oil supply to a handful of European countries, including Britain, France and Germany, in an apparent pre-emptive counter move against an upcoming oil embargo which the EU said comes into effect on July 1.

The supply stoppage has resulted in heightened volatility in the global oil market and inflicted considerable losses on oil-thirsty developed economies.

The whole world would have to pay an even heavier price should the Strait of Hormuz, the route for about a fifth of the world's oil, be closed, as Iran has repeatedly threatened to do.

Any extreme move in this regard violates the right of free passage through international waters and is against the common desire of the international community.

Mindful of all these, the negotiators to attend the Saturday talks in Istanbul, Turkey, should show flexibility and sincerity in addressing each other's concerns so as to achieve positive results leading up to a final solution to Iran's nuclear issue.