Pope John Paul II
Redemptoris Missio §57
Redemptoris Missio: On the Permanent Validity of the Church's Missionary Mandate
57 A vast field lies open to dialogue, which can assume many forms and expressions: from exchanges between experts in religious traditions or official representatives of those traditions to cooperation for integral development and the safeguarding of religious values; and from a sharing of their respective spiritual experiences to the so-called "dialogue of life," through which believers of different religions bear witness before each other in daily life to their own human and spiritual values, and help each other to live according to those values in order to build a more just and fraternal society. Each member of the faithful and all Christian communities are called to practice dialogue, although not always to the same degree or in the same way. The contribution of the laity is indispensable in this area, for they "can favor the relations which ought to be established with the followers of various religions through their example in the situations in which they live and in their activities." Some of them also will be able to make a contribution through research and study. I am well aware that many missionaries and Christian communities find in the difficult and often misunderstood path of dialogue their only way of bearing sincere witness to Christ and offering generous service to others. I wish to encourage them to persevere with faith and love, even in places where their efforts are not well received. Dialogue is a path toward the kingdom and will certainly bear fruit, even if the times and seasons are known only to the Father (cf. Acts 1:7).
Source: Redemptoris Missio (Vatican.va)