77. We can now ask how much further we must travel until that blessed day when full unity in faith will be attained and we can celebrate together in peace the Holy Eucharist of the Lord. The greater mutual understanding and the doctrinal convergences already achieved between us, which have resulted in an affective and effective growth of communion, cannot suffice for the conscience of Christians who profess that the Church is one, holy, catholic and apostolic. The ultimate goal of the ecumenical movement is to re-establish full visible unity among all the baptized.

78. In the ecumenical movement, it is not only the Catholic Church and the Orthodox Churches which hold to this demanding concept of the unity willed by God. The orientation towards such unity is also expressed by others.129

Ecumenism implies that the Christian communities should help one another so that there may be truly present in them the full content and all the requirements of "the heritage handed down by the Apostles".¹³⁰ Without this, full communion will never be possible. This mutual help in the search for truth is a sublime form of evangelical charity.

The documents of the many International Mixed Commissions of dialogue have expressed this commitment to seeking unity. On the basis of a certain fundamental doctrinal unity, these texts discuss Baptism, Eucharist, ministry and authority.

From this basic but partial unity it is now necessary to advance towards the visible unity which is required and sufficient and which is manifested in a real and concrete way, so that the Churches may truly become a sign of that full communion in the one, holy, catholic and apostolic Church which will be expressed in the common celebration of the Eucharist.

This journey towards the necessary and sufficient visible unity, in the communion of the one Church willed by Christ, continues to require patient and courageous efforts. In this process, one must not impose any burden beyond that which is strictly necessary (cf.Acts 15:28).

79. It is already possible to identify the areas in need of fuller study before a true consensus of faith can be achieved: 1) the relationship between Sacred Scripture, as the highest authority in matters of faith, and Sacred Tradition, as indispensable to the interpretation of the Word of God; 2) the Eucharist, as the Sacrament of the Body and Blood of Christ, an offering of praise to the Father, the sacrificial memorial and Real Presence of Christ and the sanctifying outpouring of the Holy Spirit; 3) Ordination, as a Sacrament, to the threefold ministry of the episcopate, presbyterate and diaconate; 4) the Magisterium of the Church, entrusted to the Pope and the Bishops in communion with him, understood as a responsibility and an authority exercised in the name of Christ for teaching and safeguarding the faith; 5) the Virgin Mary, as Mother of God and Icon of the Church, the spiritual Mother who intercedes for Christ's disciples and for all humanity.

In this courageous journey towards unity, the transparency and the prudence of faith require us to avoid both false irenicism and indifference to the Church's ordinances.131 Conversely, that same transparency and prudence urge us to reject a halfhearted commitment to unity and, even more, a prejudicial opposition or a defeatism which tends to see everything in negative terms.

To uphold a vision of unity which takes account of all the demands of revealed truth does not mean to put a brake on the ecumenical movement.¹³² On the contrary, it means preventing it from settling for apparent solutions which would lead to no firm and solid results.¹³³ The obligation to respect the truth is absolute. Is this not the law of the Gospel?