'The Church is unwavering in upholding its dogmatic teachings, but does not insist upon those matters of faith which have not been specifically defined. The Eastern Orthodox believe that there must always be room for mystery when speaking of God. Individuals are permitted to hold theologoumena (private theological opinions) so long as they do not contradict traditional Eastern Orthodox teaching. Sometimes, various Holy Fathers may have contradictory opinions about a certain question, and where no consensus exists, the individual is free to follow their own conscience.
Eastern Orthodoxy interprets truth based on three witnesses: the consensus of the Holy Fathers of the Church; the ongoing teaching of the Holy Spirit guiding the life of the Church through the nous, or mind of the Church (also called the "Universal Consciousness of the Church"), which is believed to be the Mind of Christ (1 Corinthians 2:16); and the praxis of the church (including among other things asceticism, liturgy, hymnography and iconography).
The consensus of the Church over time defines its catholicity—that which is believed at all times by the entire Church. St. Vincent of Lerins, wrote in his Commonitoria (434 AD), that Church doctrine, like the human body, develops over time while still keeping its original identity: "n the Orthodox Church itself, all possible care must be taken, that we hold that faith which has been believed everywhere, always, by all" Those who disagree with that consensus are not accepted as authentic "Fathers." All theological concepts must be in agreement with that consensus. Even those considered to be authentic "Fathers" may have some theological opinions that are not universally shared, but are not thereby considered heretical. Some Holy Fathers have even made statements that were later defined as heretical, but their mistakes do not exclude them from position of authority (heresy is a sin of pride; unintended error does not make one a heretic, only the refusal to accept a dogma which has been defined by the church). Thus an Eastern Orthodox Christian is not bound to agree with every opinion of every Father, but rather with the consensus of the Fathers, and then only on those matters about which the church is dogmatic.' - https://en.wikipedia.org/wiki/Eastern_Orthodox_theology
How confident would you be in expressing any disagreement?