Editor’s Note: Nelson’s Annual Preacher’s Sourcebook, Volume 4  features sermons, articles, and sermon starters by Dr. Greg Thornbury, Dr. Ronnie Floyd, Dr. Thomas White, Dr. Jason Allen, Dr. Robert Jeffress, Pastor Greg Laurie, Dr. Mac Brunson, Pastor Jim Cymbala, Dr. Robert Sloan, Dr. Albert Mohler, Dr. Russell Moore, Dr. Jason Duesing, Dr. Jamie Rasmussen, and Dr.…