The Christian Faith is a gift of Christ offered to all humankind for the life of the world and its salvation. The Faith is not just the truths given by Christ, but rather the gift of common trust in Christ who is the Truth and lives in His Church among the Faithful in the Mysteries of Grace, that is to say, the sacramental life of the Church. All of the life of the Church, including prayer and loving acts toward others in the name of the Lord, is sacramental and grace-filled. This Faith was delivered by Christ to the Apostles, and passed down to all subsequent generations by Apostolic Succession within the Body of Christ. The Christian Faith in its fulness is also called the Orthodox Faith, because it is lived and expressed in right worship, and presents sound doctrine. Right worship is the service of God practiced in His Church according to His ordinances.
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After reading these, you may be interested in reading the following series of four books on the Christian Orthodox Faith:
History of Orthodox Christianity: