The Bible – literally, the Book - is first and foremost the story of God’s love for His creation, His love for the human race, His love for you and me, beginning with the creation of the universe in Genesis, continuing through the formation of the people of Israel and the sending of His prophets in the Old Testament; and, “in these last days” (Hebrews 1:1), the sending of His Son, “the Word made flesh” (John 1:14) in Jesus Christ, to redeem us; and ultimately, on the Day of Judgment, the re-creation of the universe as described in the Book of Revelation.
The Bible tells us:
1.) Who God is and what He has done for us;
2.) What it means to truly be a human being and what the purpose of our life is; and
3.) How each of us should respond – with our whole life – to what God has done for us in His love.
For the detailed article see this link: Holy Bible - The Canon of the Orthodox Church.