9 For this to be brought about it is absolutely necessary that all should take St. Cyril as their model in striving for a true harmony of souls, a harmony established by that triple bond which Christ Jesus, the Founder of the Church, willed to be the supernatural and unbreakable link provided by Him for binding and holding together: the bond of one faith, of one charity towards God and all men, and of one obedience and rightful submission to the hierarchy established by the Divine Redeemer Himself. As you know full well, Venerable Brethren, these three bonds are so necessary that, if any one of them be lacking, true unity and harmony in the Church of Christ is unthinkable.
Source: Orientalis Ecclesiae (Vatican.va)