Tonight, in our last regular preaching class, one of the students asked Dr. Vogel, "If you could only say one thing to us, what would it be?" Dr. Vogel replied, "Guard your walk with the Lord. It doesn't matter how much you invest in your preaching skills if you shipwreck your faith because you failed to guard your heart" (rough paraphrase). He gave us a couple of examples of men who had excelled at preaching but failed miserably in ministry because they let down their guard and Satan landed a crushing right hook on their glass jaw.
"Be killing sin or it will be killing you."
Thanks Dr. Vogel and John Owen.