Ut Unum Sint §33

³³ In the Council's thinking, ecumenical dialogue is marked by a common quest for truth, particularly concerning the Church. In effect, truth forms consciences and directs efforts to promote unity. At the same time, it demands that the consciences and actions of Christians, as brethren divided from one another, should be inspired by and submissive to Christ's prayer for unity. There is a close relationship between prayer and dialogue. Deeper and more conscious prayer makes dialogue more fruitful. If on the one hand, dialogue depends on prayer, so, in another sense, prayer also becomes the ever more mature fruit of dialogue.