Redemptoris Missio §43

⁴³ Christians and Christian communities are very much a part of the life of their respective nations and can be a sign of the Gospel in their fidelity to their native land, people and national culture, while always preserving the freedom brought by Christ. Christianity is open to universal brotherhood, for all men and women are sons and daughters of the same Father and brothers and sisters in Christ. The Church is called to bear witness to Christ by taking courageous and prophetic stands in the face of the corruption of political or economic power; by not seeking her own glory and material wealth; by using her resources to serve the poorest of the poor and by imitating Christ's own simplicity of life. The Church and her missionaries must also bear the witness of humility, above all with regard to themselves-a humility which allows them to make a personal and communal examination of conscience in order to correct in their behavior whatever is contrary to the Gospel and disfigures the face of Christ.