Mention is regularly made of the difficulty of uniting Christian experience and the dimension of contemporaneousness. Quite often – too often – the impression we gain is that one reality is opposed to the other. Is it in fact viable to build a Christian identity while at the same time assuming the condition of being a citizen? The choice of being a Christian implies ipso facto the dimension of incarnation, which demands the building of the human city at every moment in the historical course of humanity. It is not possible to fulfil Christian commitment without also accepting a commitment and a joint responsibility for the building of human history.