Orthodox Christianity is the life in faith of the Orthodox Church, inseparable from that concrete,historic community and encompassing its entire way of life. The Orthodox Christian faith is that faith "handed once to the saints" (Jude 3), passed on in Holy Tradition to the apostles by Jesus Christ, and then handed down from one generation to the next, without addition or subtraction.

The sole purpose of Orthodox Christianity is the salvation of every human person, uniting him to Christ in the Church, transforming him in holiness, and imparting eternal life. This is the Gospel, the good news, that Jesus is the Messiah, that he rose from the dead, and that we may be saved as a result.

Orthodox Christians worship the Father, Son, and Holy Spirit—the Holy Trinity, the one God. Following the Holy Scriptures and the Church Fathers, the Church believes that the Trinity is three divine persons who share one essence. It is paradoxical to believe thus, but that is how God has revealed himself. All three persons are consubstantial with each other, that is, they are of one essence and coeternal. There never was a time when any of the persons of the Trinity did not exist. God is beyond and before time and yet acts within time, moving and speaking within history.

God is not an impersonal essence or mere "higher power," but rather each of the divine persons relates to mankind personally. Neither is God a simple name for three gods (i.e., polytheism), but rather the Orthodox faith is monotheist and yet Trinitarian. The God of the Orthodox Christian Church is the God of Abraham, Isaac and Jacob, the I AM who revealed himself to Moses in the burning bush.

The primary statement of what the Church believes about God is to be found in the Nicene Creed:

I believe in one God, Father Almighty, Creator of heaven and earth, and of all things visible and invisible.
And in one Lord Jesus Christ, the only-begotten Son of God, begotten of the Father before all ages;
Light of Light, true God of true God, begotten, not created, of one essence with the Father through Whom all things were made.
Who for us men and for our salvation came down from heaven and was incarnate of the Holy Spirit and the Virgin Mary and became man.
He was crucified for us under Pontius Pilate, and suffered and was buried;
And He rose on the third day, according to the Scriptures.
He ascended into heaven and is seated at the right hand of the Father;
And He will come again with glory to judge the living and dead. His kingdom shall have no end.
And in the Holy Spirit, the Lord, the Creator of life, Who proceeds from the Father, Who together with the Father and the Son is worshipped and glorified, Who spoke through the prophets.
In one, holy, catholic, and apostolic Church.
I confess one baptism for the forgiveness of sins.
I look for the resurrection of the dead, and the life of the age to come.
Amen.