Our Eastern Catholic brothers and sisters are very conscious of being the living bearers of this tradition, together with our Orthodox brothers and sisters. The members of the Catholic Church of the Latin tradition must also be fully acquainted with this treasure and thus feel, with the Pope, a passionate longing that the full manifestation of the Church’s catholicity be restored to the Church and to the world, expressed not by a single tradition, and still less by one community in opposition to the other; and that we too may be granted a full taste of the divinely revealed and undivided heritage of the universal Church(2) which is preserved and grows in the life of the Churches of the East as in those of the West.
vatican.va/holy_father/john_paul_ii/apost_letters/documents/hf_jp-ii_apl_02051995_orientale-lumen_en.html