“This joint commemoration remains a fruitful opportunity for ecumenism, for it marked not a goal but rather a point of departure in the ecumenical quest for full and visible unity between Christians, under the threefold sign of gratitude, repentance and hope, all three of which are indispensable if we truly desire to heal our memory,” he said, noting: “It is not by chance that our efforts are moving towards the study of a major ecumenical question that we intend to discuss in the future, namely, the nature of the Church.”