51 The Council's approach has proved fruitful both for the steady maturing of fraternal relations through the dialogue of charity, and for doctrinal discussion in the framework of the Joint International Commission for the Theological Dialogue between the Catholic Church and the Orthodox Church . It has likewise proved most fruitful in relations with the Ancient Churches of the East. The process has been slow and arduous, yet a source of great joy; and it has been inspiring, for it has led to the gradual rediscovery of brotherhood.
Source: Ut Unum Sint (Vatican.va)