Spying among friends is never acceptable.

Don't get bitter and twisted and nasty by life. You may have been wronged or cheated on; two wrongs never make a right. Instead learn your mistakes and learn your lessons. Remain strong with your head held high.

The times when we could fully count on others are over to a certain extent.

If Europe today accounts for just over 7 per cent of the world's population, produces around 25 per cent of global GDP and has to finance 50 per cent of global social spending, then it's obvious that it will have to work very hard to maintain its prosperity and way of life.

Europe can only hold together and stand together, which is very important in times of migration challenges, terrorism challenges, if each country takes responsibility for itself.

I'm a person who acknowledges reality. I don't get up every morning and ask myself: What would I do differently if I were chancellor in a black-and-yellow (Christian Democrat and Free Democrat) coalition? The SPD (Social Democratic Party) and the (Christian Democrat and Christian Social) Union stand to weaken their own positions if they don't make this coalition a success. And we both want success.

We must never forget our responsibilities as politicians to our country and its citizens. We must always remain humble before our people.