Bear with me, whatever I thought I had and left, is back. My fever is epic.
"Morality" is misconstrued in Orthodoxy by many including most Orthodox.
Morality ain't some list of rules about right and wrong to appease an Angry God or so that we can be "better" people.
God's and man's relationship is based on a clear understanding of what man's relationship to the world, his neighbor, and obviously God is.
In other words, "morality" or rather let's say the truth about how to live life given to us from God is how reality is. Living outside proper relationship with God and our neighbor, we are in delusion. And the greater the delusion, the more difficult the way back to reality, which is to say back to a loving relationship with God and our neighbor.
This is why "morality" IS spirituality. Forget all the esoteric and obviously "spiritual" stuff until you got the basics of spirituality down. The basic understanding of reality: your relationship with God and neighbor down.
This is why God's commandments altered over time with humankind. For we don't have a personal relationship with God alone. Nor do we start as children as some sorta tabula rasa or unfallen creature of God.
Sin and thus separation fron God and our neighbor are ontological, it is in our very being. From conception on, we are sinners. We carry the separation from God experienced from our parents, their parents, and their parents, and so on.
Thankfully, God is merciful and loves mankind. And has worked with us and our forefathers from the very beginning after the fall to show us the way back home.
God's last Word on way back was His Word. His Son in flesh who walked among us showing us how to live in communion with God and our neighbors. He taught us through His life, His words, and ultimately His death how to relate to God and our neighbor.
Thus morality ain't some lists of rules to follow to be "good". It may start as a list of rules, but ultimately God's revelation to us of our proper position in the world is to come back to reality, to the love of God and love of our neighbor. And His last Word is and Way is through His Son Jesus Christ.
Everything else is simply fantasy.