Bishop Yegorevsky Mark, deputy head of external relations for the Moscow Patriarch, who is leading a Russian Orthodox Church delegation to the Vatican, said decisions made by Catholic leaders over liturgical issues would ultimately result in a return to traditions.
More than 250 bishops are attending the general assembly, which opened Monday. The assembly, scheduled to run for three weeks, is focusing on the theme "the Eucharist, source and summit of the life and mission of the Church".
Mark said changes made 40 years ago had substantially relaxed access to Catholic communion.
"The aim of the Catholic Church to adapt to the modern world, to make Christianity more understandable and 'easy' for the world has had serious negative consequences," he said.
According to Mark, this situation has also caused a reverse reactionary process, geared towards returning to the same traditions the Orthodox Church has faithfully observed.
"We view this process as a confirmation of the correctness of our own experience and the importance of maintaining our traditions," the bishop said.