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.
It absolutely does, but God has given us the Scriptures to know Him better - as has been pointed out on this thread, Scripture *is* profitable, it is just not sufficient.
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
Agreed. But faith in God came to +Aquinas in a very different way than it came to +Teresa of Avila. Scripture, coupled with the oral teachings of Paul, is one path to Him - the Bereans apparently took that one.