To be sure, the risk of losing it is not unreal. I would like to make two brief points here. The geography of Christianity has changed dramatically in recent times, and is in the process of changing further. Faced with a new form of Christianity, which is spreading with overpowering missionary dynamism, sometimes in frightening ways, the mainstream Christian denominations often seem at a loss. This is a form of Christianity with little institutional depth, little rationality and even less dogmatic content, and with little stability. This worldwide phenomenon -- that bishops from all over the world are constantly telling me about -- poses a question to us all: what is this new form of Christianity saying to us, for better and for worse? In any event, it raises afresh the question about what has enduring validity and what can or must be changed -- the question of our fundamental faith choice.
The second challenge to worldwide Christianity of which I wish to speak is more profound and in our country more controversial: the secularized context of the world in which we Christians today have to live and bear witness to our faith. God is increasingly being driven out of our society, and the history of revelation that Scripture recounts to us seems locked into an ever more remote past. Are we to yield to the pressure of secularization, and become modern by watering down the faith? Naturally faith today has to be thought out afresh, and above all lived afresh, so that it is suited to the present day. Yet it is not by watering the faith down, but by living it today in its fullness that we achieve this. This is a key ecumenical task in which we have to help one another: developing a deeper and livelier faith. It is not strategy that saves us and saves Christianity, but faith -- thought out and lived afresh; through such faith, Christ enters this world of ours, and with him, the living God. As the martyrs of the Nazi era brought us together and prompted that great initial ecumenical opening, so today, faith that is lived from deep within amid a secularized world is the most powerful ecumenical force that brings us together, guiding us towards unity in the one Lord. And we pray to him, asking that we may learn to live the faith anew, and that in this way we may then become one.