There is nothing more important than the gospel.  There is no point at which we as Christians can dispense with it.  And so it is a pleasure to note that Crossway Books has recently published this volume of sermons on 2nd Timothy stemming from the April 2009 Gospel Coalition conference.  Entrusted with the Gospel: Pastoral Expositions of 2 Timothy is available here.  Edited and introduced by D. A. Carson, the volume includes sermons by John Piper, Phillip Ryken, Mark Driscoll, K. Edward Copeland, Bryan Chapell, and J. Ligon Duncan.