1917. Harvard Theological Studies II. From the preface: It is my purpose in the following pages to examine in detail the Pauline idea of faith, which was fundamental in the Apostle's conception of Christianity. What is the content of the idea in Paul? How is it related to trust in Jahveh, which was so prominent an element in Hebrew and Jewish piety? Was there anything analogous to the Pauline idea of faith in the religious thought of the Graeco-Roman world or in the Oriental mystery cults, which enjoyed great popularity in the West during the centuries immediately preceding and following the advent of Christianity? These are the questions which I shall endeavor to answer. Contents: Trust in Jahveh; The Pauline Idea of Faith; and Faith and the Religions of the Graeco-Roman World.