To be more specific, for Eastern Orthodox Christians, the Orthodox Church that they enter is the same as being in the presence of the Ark of the Covenant or the presence of Christ on Mount Tabor where Moses removed his sandals standing on hallowed ground in the presence of God.
Within this Triune Christian Godhead are these three co-equal persons, each one dwelling in the other by virtue of an unceasing movement of mutual love. Yet, they stay mystically undivided.
The Orthodox Christian faith is the original and oldest Christian faith. It sees itself as the fullness of the revelation of God to man, and that the Orthodox Church is the ancient community of believers founded by Jesus Christ and the apostles.