Dr. H.K. McKnight lifted the microphone to his lips. "I may be 66, but I've got some life in me," he told the congregation of the church he founded, Bible Deliverance Temple. It's enough life, he told them, that on an upcoming trip he'll be able to ride mountain rapids with the youth group, troop around Six Flags and then drive back the same night. "I'm supposed to preach the next morning," he said, turning to look at his son, Dr. Kelly McKnight, manning the keyboard behind him. "But I'm telling you now -- you've got it," he told his son.