John Piper has had a tremendous impact on my life. He’s been faithfully serving the Lord for over forty years now. Young guns in the ministry can learn a lot from Piper’s view of the authority and sufficiency of Scripture and his commitment to expositional preaching. I recently discovered quite a treasure–the oldest existing (that I know of anyways) audio of Piper’s preaching. Here’s a link to the sermon. It’s his chapel sermon at Fuller Theological Seminary, delivered on March 24, 1971. Piper was 25 years old at the time. The subject is, of course, the glory of God.