Donald Trump is withdrawing from the Paris climate agreement because he wants to lower environmental standards for American products and manufacture more cheaply. His reasoning is quite simple, but very shortsighted. It won't succeed because, by doing so, Trump is missing a golden opportunity to modernize American industry.

It is courageous to occasionally admit that there are certain things one can't do.

My mother's brother was killed while clearing mines in 1945. Those are things that mark your childhood and they help explain why we are so devoted to European unity.

We need a comprehensive renewal of the nursing care system in Germany, and quickly. The two-tier medical system must be abolished. Patients with public health insurance are waiting months to be seen by a specialist doctor, while doctors increasingly give priority to privately insured patients. That's unacceptable. We also need an educational revolution. Medicine, nursing care, education: Germany is not a modern country when it comes to these three areas. We have to adapt our policies to the social reality. These are projects that can awaken Germany out of its torpor.

The quota idea is a good one, but there are two problems with it. The first is clear: A quota system would also require all European countries to be prepared to take refugees. And secondly: What happens when the quota has been filled? Would we then simply tell those who are threatened, sorry but we have to send you back?

Would I sacrifice a friendship to take a step forward in my political career? Thus far in my political career, I have been spared from having to make such a decision, thank God. And I can't imagine what it must be like.

I'm not a populist. But I try to present complicated issues in such a way that people know where I stand.