R.C. Sproul has served the church as a seminary professor, preacher, and author for more than forty years. He is the founder and chairman of Ligonier Ministries and can be heard teaching daily on the radio program "Renewing Your Mind", which broadcasts on more than 300 radio outlets in the United States and throughout 50 countries. Dr. Sproul has written more than 60 books and serves as Senior Minister of Preaching and Teaching at Saint Andrew's Chapel in Florida.