The Christians of Europe are still gathering in their big old churches. But the communities are getting smaller, and many things that used to be natural are falling apart. Christianity is no longer a form of life for many baptized persons. And for many others, the question of God or of the Church has become insignificant. However, it is noteworthy that the number of those who are newly asking about the Christian faith is growing. You want to get to know him better. They want to know what Christianity really is. Of course, much more would be true about the Christian faith. But in these fifty letters, the most important things are said.