The history of how the Bible developed teaches us a most overarching central truth. It is the same central truth of Jesus life and message which was that most important thing of all was to love God and his compassionate justice for all, especially the poor and oppressed and to love your fellow man as yourself.
Jesus' core message was the same as that of the great rabbis who came before him. Wise men always understood that the Bible was to be interpreted and used according to these great principles which are elastic and stretch to cover all situations in life positively. Using this core as one's guideline keeps the Bible from becoming a self destructive tool in the hands of the unlearned who usually wind up worshiping the Bible and their particular interpretation of it more than they do God.
In the West, the more people were encouraged to make the Bible the focus of their spirituality, the harder it became to find and follow its simple core message. It became a source of great divisiveness. Any passage could be interpreted to serve diametrically opposed interests for there was no good simple interpretive core like Jesus had.
At the same time African Americans used the Exodus story and Jesus story to develop their theology of liberation, the Ku Klux Klan was using the Bible to justify its lynching of African Americans. Others used it to justify their enslaving of those different and murdering those who disagreed with them just as Moses exterminated those who rebelled against him and as Joshua massacred the Canaanites.
However neither of these events really happened in history. They are made up stories, legends, several centuries after they were supposed to have happened. This historical knowledge strongly reinforces Jesus' interpretive core of love of God and fellow man.
The Exodus must be interpreted by Jesus' core because it does not mean liberation for everyone. It allowed the selling of your daughters into slavery. Earlier it ordered the abandonment of the Egyptian slave girl Hagar and her son Ismael in the wilderness. No wonder there has been so much enmity between Arabs and Israelis.
Scripture alone could point people in the direction of the Bible but it could never provide an absolute guideline because people could always find an alternative passage to support an opposing viewpoint. By the seventeenth century, religious people were realizing the Bible could be a very confusing book and science was rising in influence, and clarity and rationality of thought were prized as never before. Only the ancient core message of the Bible can preserve a rational meaning and influence for society in such an age.