27 We would have this to be known and appreciated by all, both by those who were born within the bosom of the Catholic Church, and by those who are wafted towards her, as it were, on the wings of yearning and desire. The latter especially should have full assurance that they will never be forced to abandon their legitimate rites or to exchange their own venerable and traditional customs for Latin rites and customs. All these are to be held in equal esteem and equal honor, for they adorn the common Mother Church with a royal garment of many colors. Indeed this variety of rites and customs, preserving inviolate what is most ancient and most valuable in each, presents no obstacle to a true and genuine unity. It is especially in these times of ours, when the strife and discord of war have estranged men's hearts from one another nearly all the world over, that all must be impelled by the stimulus of Christian charity to promote union in Christ and through Christ by every means in their power.
Source: Orientalis Ecclesiae (Vatican.va)