In these ecumenical groups comes the "branch theory" of the Church, where there exists many Christians Churches and the Orthodox is just one of many. This branch theory stands in glaring contradiction to the Orthodox Symbol of Faith, the Creed, which states that there is only One Holy Catholic and Apostolic Church. Of all the Christian bodies, the Orthodox Church is the only one that remained the faithful keeper of the whole Sacred Tradition, avoiding heretical doctrines and other unwarranted innovations. The Faith does not alter with the times, it does not deteriorate from circumstances, but remains the same, both old and new.
So how is union with the heterodox to the Orthodox Faith even possible through our involvement in ecumenical circles? Is the search for the Truth important in these ecumenical circle? I seriously think it is time for the Orthodox who participate in any of these ecumenical or interfaith movements to reconsider their position. After all these years of our involvement the West has yet to grasp anything Orthodox. Have any of our goals of the Orthodox been achieved? Our continued involvement disregards what the Lord told His Disciples, "Go ye therefore and teach all nations, baptizing them in the name of the Father, and the Son, and of the Holy Spirit, teaching them to observe all things whatsoever I have commanded you. And lo, I am with you alway, even unto the end of the world." (Matt. 28:19-20).
Would Christianity exist today, if the Holy Apostles ,instead of preaching repentance, as they were commanded by our Lord and God, had undertaken interfaith dialogues and cooperated with idolaters for the supposed good of the world? What purpose does the Orthodox have in interfaith participation when the CC has had speakers such as the Presbyterian theologian Dr. Chung and the Dalai Lama? Are these speakers and others , the 'speakers" of Truth?