132. Specifically to my brother Bishops, who "are directly responsible, together with me, for the evangelization of the world, both as members of the College of Bishops and as Pastors of the particular Churches",251 I wish to address a special word in this regard. In their daily ministry to the flock entrusted to them, they must never lose sight of the needs of the Church as a whole. As Catholic Bishops, they must feel the concern for all the Churches which burned in the Apostle's heart (cf. 2 Cor 11:28). Nor can they fail to express this concern, especially when they deliberate and decide together as members of their respective Episcopal Conferences. Through liaison bodies at the regional and continental levels, they are in a better position to discern and evaluate the pastoral needs surfacing in other parts of the world. The Bishops express their apostolic solidarity in a pre-eminent way through the Synod of Bishops: "among its affairs of general concern, it should give special consideration to missionary activity. For this is a supremely great and sacred task of the Church".252