40. Today missionary activity still represents the greatest challenge for the Church. As the end of the second millennium of the redemption draws near, it is clear that the peoples who have not yet received an initial proclamation of Christ constitute the majority of mankind. The results of missionary activity in modern times are certainly positive. The Church has been established on every continent; indeed today the majority of believers and particular churches is to be found no longer in Europe but on the continents which missionaries have opened up to the faith.

The fact remains however that the "ends of the earth" to which the Gospel must be brought are growing ever more distant. Tertullian's saying, that the Gospel has been proclaimed to all the earth and to all peoples,67 is still very far from being a reality. The mission ad gentes is still in its infancy. New peoples appear on the world scene, and they too have a right to receive the proclamation of salvation. Population growth in non-Christian countries of the South and the East is constantly increasing the number of people who remain unaware of Christ's redemption.

We need therefore to direct our attention toward those geographical areas and cultural settings which still remain uninfluenced by the Gospel. All who believe in Christ should feel, as an integral part of their faith, an apostolic concern to pass on to others its light and joy. This concern must become, as it were, a hunger and thirst to make the Lord known, given the vastness of the non-Christian world.