In this volume of the John Wesley Collection, key resources for understanding the spiritual message underlying Wesley's Aldersgate experience have been assembled: Wesley's Journal entry for May 24, 1738, Luther's preface to Romans, the text of Romans itself drawn from Wesley's New Testament translation, and the notes on Romans from Wesley's Explanatory Notes Upon the New Testament. These texts offer the contemporary reader insight into the biblical and experiential dimensions of the witness of the Holy Spirit and the assurance of salvation in the life of the Christian beliver.