Heard of John Piper? This week we discuss the teaching which has perhaps affected the recent generation of pastors more than any other. We begin with a catalytic moment in Dr. Piper's ministry. At Passion One Day on May 20, 200, before 40,000 college students in Memphis, Tennessee, he preached what has come to be known as the "Shells Sermon". From there we discuss the defining doctrines of his preaching and their affects on our ministries.