About R. Scott Clark

R. Scott Clark is the President of the Heidelberg Reformation Association, the author and editor of, and contributor to several books and the author of many articles. He has taught church history and historical theology since 1997 at Westminster Seminary California. He has also taught at Wheaton College, Reformed Theological Seminary, and Concordia University. Read more» He has hosted the Heidelblog since 2007.

Ursinus on What Is the Sum and Substance of Scripture

In the prolegomena (prefatory remarks) to his published lectures on the Heidelberg Catechism, Zacharias Ursinus (1534–83), the primary author of the catechism and the one authorized by Frederick III to explain the catechism wrote: “The doctrine of the church consists of two . . . Continue reading →

Pray for R2G

Sebastian writes: “Greetings in the name of Our Lord and Savior! I am full of joy when I remember you, our brothers and sisters, dear congregations, who faithfully pray for us and support us financially! Knowing of your support and being reassured . . . Continue reading →

Legal and Gospel Mortification

Ralph Erskine (1685-1752) was the brother of Ebeneezer Erskine and a defender of the Reformation doctrines of justification and sanctification against the neonomians and legalists of his day. Mortification is the old-fashioned way of saying, “dying to self.” In the Heidelberg Catechism . . . Continue reading →