At this critical stage, the World needs clear answers to the following: Does the world trust Iran to honour its obligations? Have the Iranian negotiators accepted "unannounced rigorous inspections of every site and every facility without exceptions? And without any "ifs" and "buts"?
If the Iran nuclear deal, finalised in Geneva in the small hours of Sunday morning, sticks, the tectonic plates in the Middle East will have shifted. And whether you welcome that or fear it depends entirely on where you're sitting.
It's not often that ordinary Iranians and Israelis get the chance to talk to each other, but that's exactly what happened this week live on air on the BBC's Persian television service. What came across clearly was that despite the deep tensions between their two governments, Iranians and Israelis actually have a surprising amount in common.
Israel's Prime Minister Benjamin Netanyahu sparked a confused internet reaction to his United Nations speech - which involved