Matthew Henry on 1 Samuel 28:20-25

Those that expect any good counsel or comfort, otherwise than from God, and in the way of his institutions, will be as wretchedly disappointed as Saul. Though terrified even to despair, he was not humbled. He confessed not his sins, offered no sacrifices, and presented no supplications. He does not seem to have cared about his sons or his people, or to have attempted any escape; but in sullen despair he rushed upon his doom. God sets up a few such beacons, to warn men not to stifle convictions, or despise his word. But while one repenting thought remains, let no sinner suppose himself in this case. Let him humble himself before God, determined to live and die beseeching his favour, and he will succeed.