Even when the second millennium experienced a hardening of the polemics and the separation, with mutual ignorance and prejudice increasing all the more, nonetheless constructive meetings between church leaders desirous of intensifying relations and fostering exchanges did not cease, nor did the holy efforts of men and women who, recognizing the setting of one group against the other as a grave sin, and being in love with unity and charity, attempted in many ways to promote the search for communion by prayer, study and reflection, and by open and cordial interaction.(
haec atque talia lacrimis et arteadulterae penetrantia nemo prohibebat, cupientibus cunctis infringi potentiam matris et credente nullo usque ad caedem eius duratura filii odia.vatican.va vatican.va