Men of God involved in pastoral ministry have face difficult trials and temptations since the first elder was appointed in the N.T. church age. Paul informed Timothy that, “Indeed, all who desire to live godly in Christ Jesus will be persecuted” (1 Tim. 3:12). Prior to that he mentioned, “Suffer hardship with me, as a good soldier of Christ” (1 Tim. 2:3). The ministry of pastor-teachers is an important one, but it is also a difficult one.
Two men who have been involved in pastoral ministry for a number of years have spoken about Paul’s example of perseverance and even their own lives – John MacArthur at a Desiring God conference (here and here) and James MacDonald at a 9 Marks Conference. Jerry Bridges, though not a pastor, did provide sound biblical teaching on the topic of finishing well at a Desiring God conference.
Update: C.J. Mahaney recently spoke at Together for the Gospel 2012 and spoke on a similar topic.