It's really just as simple as a text not being original with the bible. The concepts of the bible in the Hebrew mostly originate with Egyptian thinking. The Greek concepts were mostly generated from a conglomeration of folklore, mainly that of Persian influence.
The fact of the matter is that much of it is inspirational in some way, and for that, I am grateful to still have access to the way many people of ancient cultures thought and lived. If anything, the biblical drama is a good tool to keep simply to look into how the ancient cults and religious institutions thought and acted. We have come a long way since then, of course.