Many things can happen very quickly in times of crisis.

Greece's debts are all denominated in euros, but it isn't clear who holds how much of those debts. For that reason, the consequences of a national bankruptcy would be incalculable. Greece is just as systemically important as a major bank.

If the conflict in Lebanon continues, the risk of attacks will grow. This is why we must contribute to a joint (international) responsibility and help secure peace in Lebanon.

It is true that no member state can be required to make payments to others. But if countries want to offer voluntary assistance, as in the Greek case, this isn't only allowed, but it's also in Germany's interest. We all benefit by ensuring the stability of the euro zone.

We are facing a whole collection of crisis-like developments that we have to watch closely. But we also have to be careful what we point to as crisis indicators.

We will not be able to meet the challenges of integration and the threats posed by international terrorism. If we want to prevent attacks, we'll need more information and better integration.

At the moment we are facing a whole collection of difficult to forecast developments from the situation in China and the oil-price crash to the worrying news from some banks in Europe and the US. All of that is linked: Worldwide company debt is high and there is a lot of money in circulation. That is why necessary structural reforms are not being made.