These pages represent the compendium of a long journey of more than twenty-five years. It would be simplistic to define this journey as exclusively intellectual, because it would be unthinkable without frequent visits to the Middle East, in particular to Turkey, the second Holy Land of Christianity, the ancient Asia Minor of biblical history, with its overwhelming Muslim population today. The fact is that, since many years now, the theme of hospitality has been the subject of numerous publications, studies, contributions and gatherings with protagonists of various opinions and expertise convening to give answers to questions related to the challenge of living together in the complex society of our contemporary world. It is precisely by letting ourselves be questioned by these complexities that we become aware that the challenge of hospitality is not merely economic or political but also spiritual.