Chapter 19 is a chapter of success, followed by one of persecution. David is here learning to wait God's time.
We can understand Jonathan a little. Well over sixty years ago when I was on military service, in national service, for some little while I was given a task as a sort of Personal Assistant, or administrative helper, to the commanding officer of the unit. This man had a fearful temper – and I was in his room most of the time – sometimes directed against me, but mostly against others. When something went wrong – and it was possibly his own mistake, and he was a man who couldn't recognise that – he would almost fall apart in fury and anger, and he would shout and scream, and pace up and down, and banish everybody, fire everybody from the headquarters and so on. There would be a tempest that would go on for an hour or so. But you knew that if you found a quiet desk and just carried on, that two or three hours later you be called on the phone: ‘Why aren’t you here doing such and such a thing?’, and life would be conducted as though nothing in the world had ever happened; he could pass from raving fury to complete forgetfulness of the whole incident. This would happen at least two or three times a week. So in a sense we can understand Jonathan thinking: ‘This is my father. He wants to murder David, but he'll get over it. All will be calm; things will settle down; we can talk him round.’ So he has a go at talking Saul round, and he succeeds.