With his characteristic rigor and systematic approach, Hans Küng explains in this book why and how a critically engaged Christianity can answer for its faith before its own reason and its social context. He does so by presenting the entirety of the Christian message, drawn from the backdrop of contemporary ideologies and religions.

Practicing a truly ecumenical theology, Küng delves into the very heart of the Christian faith. In this way, the human, the general religious, and the extra-ecclesial are taken seriously more than ever, but in such a way that what is specifically Christian emerges with the utmost clarity, separating the essential from the non-essential.