Because the foreshadowing is a nebulous matter, at best, a matter of personal (often hyperbolic) interpretations, and controversy. Besides, I though faith comes from God, not the Bible. Abraham, Noah, Job, etc., all had true faith (according to the Bible) without the scriptures. If one does not have faith, reading the Bible will not make him "see" the truth (because he hasn't been given the "eyes" to see), right? Yet Acts 17 seems to suggest otherwise.