I'm always quite amazed that people in Europe become unnerved when two institutions or two people have different views.

A united Europe is our Continent's only chance to avoid falling off the world's radar. The heads of government of Germany, France and the United Kingdom also know that their voice is only heard internationally because they speak through the megaphone of the European Union.

I prefer to concentrate on my task of leading Europe to the success that our citizens expect. We have to look forwards now because what is at stake is what makes Europe Europe.

Greeks have to know that they are not alone ... Those who are fighting for the survivor of Greece inside the Euro area are deeply harmed by the impression floating around in the Greek public opinion that Greece is a victim. Greece is a member of the EU and the euro. I want Greece to be a constructive member of the Union because the EU is also benefiting from Greece.

Here in Brussels, we did everything to accommodate David Cameron's concerns. My collaborators and I personally spent countless days and nights negotiating an agreement that was fair toward the United Kingdom and toward the other 27 Member States. I was then very surprised to see that this settlement played no role whatsoever in the campaign in the United Kingdom. At the same time it is hardly surprising.

Trump is a partner for us who cannot be easily categorized. Putting it in the noblest way possible, his understanding of politics is a little different from ours here in Europe. The way he acts forces us Europeans to take on a new responsibility. We are not standing with our backs up against the wall, but, to put it as pithily as the German chancellor has: We can no longer rely on the U.S. the way we could in the past.

I notice with a certain sense of regret that far too many Europeans are returning to a regional and national mindset.