Principle Preaching, preaching life-changing principle-based sermons, is the style of preaching that John Bisagno, recently retired pastor, has been using for nearly fifty years in ministry. Principle preaching takes biblical principles and makes life applications by infusing these principles into the narrative preached. As a result, hearers of your sermons, instead of having three or four judiciously made sermon points, have life application principles they can put into practice in their daily life--immediately.