This is found in an Orthodox book written with a false understanding of Roman Catholic teaching, and it spreads their heretical understanding to others, demonstrating our faith in a false light. http://ortodoks.dk/ortodoks-tro-og-...odox-veneration-of-mary-the-birthgiver-of-god.
Here is the exact quote:
According to the commentary of the Latin theologians, “Mary is an associate with our Redeemer as Co-Redemptress” (see Lebedev, op. cit. p. 273). “In the act of Redemption, She, in a certain way, helped Christ” (Catechism of Dr. Weimar). “The Mother of God,” writes Dr. Lentz, “bore the burden of Her martyrdom not merely courageously, but also joyfully, even though with a broken heart” (Mariology of Dr. Lentz). For this reason, She is “a complement of the Holy Trinity,” and “just as Her Son is the only Intermediary chosen by God between His offended majesty and sinful men, so also, precisely, –the chief Mediatress placed by Him between His Son and us is the Blessed Virgin.” “In three respects-as Daughter, as Mother, and as Spouse of God-the Holy Virgin is exalted to a certain equality with the Father, to a certain superiority over the Son, to a certain nearness to the Holy Spirit” (“The Immaculate Conception,” Malou, Bishop of Brouges).
Thus, according to the teaching of the representatives of Latin theology, the Virgin Mary in the work of Redemption is placed side by side with Christ Himself and is exalted to an equality with God. One cannot go farther than this. If all this has not been definitively formulated as a dogma of the Roman church as yet, still the Roman Pope Pius IX, having made the first step in this direction, has shown the direction for the further development of the generally recognized teaching of his church, and has indirectly confirmed the above-cited teaching about the Virgin Mary.
Thus the Roman church, in its strivings to exalt the Most Holy Virgin, is going on the path of complete deification of Her.
It is not a true statement, and it was never issued by the Catholic Church.