Historically the Bible isn't the morality manual of the Church; but instead the Bible came into being and existed within the context of the Church's liturgy. The Bible is, as a Canon of Scripture, a liturgical document. The Scriptures were read out loud within the context of the liturgy, as part of the multifaceted engagement between God and man in the life of the Church and in Christian worship.
The Bible, historically, is not the Christian Qur'an. The role of the Qur'an in Islam and the role of the Bible in Christianity are fundamentally different. The Qur'an, in Islam, is the absolute Word of God which commands and instructs the ins and outs of the Muslim's life; in Christianity the Word of God is not a text, but a person, Jesus Christ--the Bible is that collection of writings which, received and held within the liturgical life of the Christian Church have been read in order to lift the faithful and point them toward Christ. It is in this capacity that they are called God's word.
St. Augustine, as an example, describes Christ as the "One Utterance" of all Scripture.
How one relates to the Bible will change, fundamentally, how one approaches, understands, engages with, and applies the Bible.
Fundamentally what is often the case is not merely that different Christians interpret the Bible differently; but different Christians have very different understandings of what the Bible's role and purpose is, and how it should even be approached in the first place.
-CryptoLutheran