So Saul, the nominal believer, has a very bad ending. What about the backslider David? Back to him in chapter 29.
David's life is a remarkable life: times and periods of strong faith and great victories in the Lord, and times also of sad failure when he slipped away from the place where God would have him be and where he would have been protected. The old writers all used to say of the life of David, it is a remarkable life to be recorded in the Scripture in such detail, because every believer, no matter whether we are walking in faith or we are in failure and we have fallen into some foolish way; every believer finds himself or herself, somewhere depicted in the life of David, and it is absolutely true. Whether it is to recover from failure and loss, or whether it is to handle triumphant and victory, we all come to the life of David, and we can see lessons and a way of escape, and God's great goodness to bring us to recovery. So not only were some aspects of the life of David remarkable in that he typifies Christ himself – but not in his failings, of course – but it is also a life full of spiritual lessons for us.