This article posits that Christians, while being in the world, are not of this world. This duality confronts them with the twofold need to be fully compliant with the demands of their faith and its calling to evangelise this world, on the one hand; and to live fully as fellow citizens of this world, and to cooperate with them in search of solutions for this world's challenges, on the other hand. Lessons are drawn from cultural anthropology theories to underscore dynamic (...) processes of change, that start from non-threatening positions of working together inclusively, thus building trust, and advancing progressively, paving ways for dialogically sharing the Gospel. These developments are at the end argued and justified theologically, and then concluded with pragmatic examples drawn from live ministries born out of the co-author's initiatives. (shrink)