BY DAVID COVINGTON* ALL OF US CHRISTIANS, FROM baby believers to the faithful gray, have trouble with repentance. We don’t get around to it quickly; when we do turn to Christ in prayer, we regularly soft-peddle our sin, or call it something less ugly than it is. I have been tempted to wonder whether the proverb, “you can lead a horse to water, but you can’t make him drink,” doesn’t apply to repentance, too. Once, as I was saying goodbye to Edward, a long-time and growing