Learning from King David's Failure

We were shocked last week when we heard that Charles had been caught in a pattern of adultery and deceit and had been removed from office. How could such a thing happen to a man who seemed to have it all together, who had successfully passed through the temptations of his younger years, who seemed to have everything a minister could want? Does this mean that his entire ministry had been a lie? Are the books, articles and tapes he produced worthless? Or did something happen to take a man who had been qualified and used of God and ruin him?