The ‘original’ sin is not primarily that man has ‘disobeyed’ God; the sin is that he ceased to be hungry for Him and for Him alone, ceased to see his whole life depending on the whole world as a sacrament of communion with God.
The sin was not that man neglected his religious duties. The sin was that he thought of God in terms of religion, i.e. opposing Him to life.
The only real fall of man is his noneucharistic life in a noneucharistic world.
Fr. Alexander Schmemann, For the Life of the World, p.18