There is no disagreement that the Christian understanding of faith has its roots in the Old Testament. Yet these roots have not been the subjects of extensive research until now; the present study attempts to fill this gap. Its point of departure is the Old Testament concept of faith as ’mn in Hif‘il. Beyond the literal meaning of this term, the study focuses on the ways it was reshaped during the Persian period and continued to evolve through history. In her historical exploration, the author documents the continuity between Old and New Testament discourses on faith. Thus, the book offers ways to think about the Old Testament foundations for the Christian doctrine of faith.