The Nuclear Security Summit was President Obama's initiative born out of his vision to leave behind a safer more prosperous world for the future generation.

The TUC's new slogan 'a future that works' sets a profound challenge. Austerity and rapid deficit reduction is failing in its own terms but even at its best it is short-sighted muddle-through politics with no vision of a new economic model.

A ring means a commitment. But more than that it means that you've talked about your shared future and have decided together on a shared vision of it.

If the euro zone doesn't come up with a comprehensive vision of its own future you'll have a whole range of nationalist xenophobic and extreme movements increasing across the European Union. And frankly questions about the British debate on EU membership will just be a small sideshow compared to the rise of political populism.

That is now my mission: to provide a European vision of growth employment prosperity - in one word our future.

A healthy vision of the future is not possible without an accurate knowledge of the past.

Not many people give you a vision of what the future will bring.

We have a positive vision of the future founded on the belief that the gap between the promise and reality of America can one day be finally closed. We believe that.

More is required of public officials than slogans and handshakes and press releases. More is required. We must hold ourselves strictly accountable. We must provide the people with a vision of the future.

I don't just want a better deal for Britain. I want a better deal for Europe too. So I speak as British prime minister with a positive vision for the future of the European Union. A future in which Britain wants and should want to play a committed and active part.