The Church’s understanding had been that under the New Covenant the Torah/law of Moses has been done away with. Yeshua said that He did not come to abolish the law but to bring to us it’s fullness (see
Matthew 5:17). Yeshua brought out the heart intent of the law, not just observance of it, empty of meaning. The New testament itself has all kinds of social, legal, moral laws! So really, we are all "under God's directives".
This was taken from the first of the web sites given by cbrickell. The authors' contention that "the church" believes...shows a very Western, Protestant view as to what is true and what is not. The EOC teaches that Jesus fulfills the OT law. He is the only one who completely fulfills all of the Psalms.
It should be noted, however, that the practice of certain rituals, or observance of certain festivals, has been eliminated. We do not observe, per se, Rosh Hashana or Purim or Feast of Tabernacles. The meaning of these feasts has come to pass. We no longer need the type because we have the reality.
As Fr. Alexander Schmemen said, "Christianity is the end of religion." All of the OT feasts were not the reality, they were mere shadows (Heb. 8:5). However, the eucharist, baptism, divine liturgy are real. They are not mere religious observance, they are a way we really commune with God. For we EO, liturgy is not what we WILL be doing in Heaven, it IS entering Heaven itself.
I never heard so much of the OT in church until I became Orthodox. It seems that most of our prayers are based on, or come directly from, the OT. And of course, our style of worship can be found in temple worship and the book of Isaiah.
I would like to point out that my priest's wife grew up in an orthodox Jewish home. She is one of three daughters. Two of the girls are married to Orthodox Christian priests. As she has pointed out to me many times, much of what is done in EO practice reminds her of her upbringing.
It is my full belief that the EO church has faithfully preserved, and practiced, the teachings of our Lord and Savior and is the "fulness of Him who fills all in all." (Eph. 1:23)
There's much more I would like to say, but I'm afraid that if I did I would stray from defending to attacking. I have no wish to do that.
Peace.
Peter