2 Samuel 17:1 - Joseph Benson’s Commentary on the Old and New Testaments

I will arise and pursue after David It seems he was a soldier as well as a counsellor. Or, at least, he thought his counsel so sure of being successful that he offered himself to put it in execution. He was probably afraid, also, that if Absalom should command the men himself, natural affection might prevail with him to spare his father, and not take away his life; or, perhaps, even work an agreement between them, and so leave him in danger of being called to account for his rebellion.