You will find in The Harper-Collins Encyclopedia of Catholicism 1995,
TO HIS VENERABLE BROTHERS IN THE EPISCOPATE
THE RELIGIOUS FAMILIES
THE SONS AND DAUGHTERS OF THE CHURCH
AND TO ALL MEN AND WOMEN OF GOOD WILL
AT THE BEGINNING OF HIS PAPAL MINISTRY
Venerable Brothers, and dear Sons and Daughters
greetings and the Apostolic Blessing
6. The road to Christian unity
What shall I say of all the initiatives that have sprung from the new ecumenical orientation? The unforgettable Pope John XXIII set out the problem of Christian unity with evangelical clarity as a simple consequence of the will of Jesus Christ himself, our Master, the will that Jesus stated on several occasions but to which he gave expression in a special way in his prayer in the Upper Room the night before he died: “I pray… Father… that they may all be one”18. The Second Vatican Council responded concisely to this requirement with its Decree on ecumenism. Pope Paul VI, availing himself of the activities of the Secretariat for Promoting Christian Unity, began the first difficult steps on the road to the attainment of that unity. Have we gone far along that road? Without wishing to give a detailed reply, we can say that we have made real and important advances. And one thing is certain: we have worked with perseverance and consistency, and the representatives of other Christian Churches and Communities have also committed themselves together with us, for which we are heartily grateful to them. It is also certain that in the present historical situation of Christianity and the world the only possibility we see of fulfilling the Church’s universal mission, with regard to ecumenical questions, is that of seeking sincerely, perseveringly, humbly and also courageously the ways of drawing closer and of union. Pope Paul VI gave us his personal example for this. We must therefore seek unity without being discouraged at the difficulties that can appear or accumulate along that road; otherwise we would be unfaithful to the word of Christ, we would fail to accomplish his testament. Have we the right to run this risk?
There are people who in the face of the difficulties or because they consider that the first ecumenical endeavours have brought negative results would have liked to turn back. Some even express the opinion that these efforts are harmful to the cause of the Gospel, are leading to a further rupture in the Church, are causing confusion of ideas in questions of faith and morals and are ending up with a specific indifferentism. It is perhaps a good thing that the spokesmen for these opinions should express their fears. However, in this respect also, correct limits must be maintained. It is obvious that this new stage in the Church’s life demands of us a faith that is particularly aware, profound and responsible. True ecumenical activity means openness, drawing closer, availability for dialogue, and a shared investigation of the truth in the full evangelical and Christian sense; but in no way does it or can it mean giving up or in any way diminishing the treasures of divine truth that the Church has constantly confessed and taught. To all who, for whatever motive, would wish to dissuade the Church from seeking the universal unity of Christians the question must once again be put: Have we the right not to do it? Can we fail to have trust-in spite of all human weakness and all the faults of past centuries-in our Lord’s grace as revealed recently through what the Holy Spirit said and we heard during the Council? If we were to do so, we would deny the truth concerning ourselves that was so eloquently expressed by the Apostle: “By the grace of God I am what I am, and his grace towards me was not in vain”19.
What we have just said must also be applied-although in another way and with the due differences-to activity for coming closer together with the representatives of the non-Christian religions, an activity expressed through dialogue, contacts, prayer in common, investigation of the treasures of human spirituality, in which, as we know well, the members of these religions also are not lacking. Does it not sometimes happen that the firm belief of the followers of the non-Christian religions-a belief that is also an effect of the Spirit of truth operating outside the visible confines of the Mystical Body-can make Christians ashamed at being often themselves so disposed to doubt concerning the truths revealed by God and proclaimed by the Church and so prone to relax moral principles and open the way to ethical permissiveness. It is a noble thing to have a predisposition for understanding every person, analyzing every system and recognizing what is right; this does not at all mean losing certitude about one’s own faith20 or weakening the principles of morality, the lack of which will soon make itself felt in the life of whole societies, with deplorable consequences besides.
One is the community of all peoples, one their origin, for God made the whole human race to live over the face of the earth.(1) One also is their final goal, God. His providence, His manifestations of goodness, His saving design extend to all men,(2) until that time when the elect will be united in the Holy City, the city ablaze with the glory of God, where the nations will walk in His light.(3)