12 I said, 'Now the Philistines will come down against me at Gilgal, and I have not sought the favor of the Lord.' So I forced myself, and offered the burnt offering." 13 And Samuel said to Saul, "You have done foolishly. You have not kept the command of the Lord your God, with which he commanded you. For then the Lord would have established your kingdom over Israel forever. 14 But now your kingdom shall not continue. The Lord has sought out a man after his own heart, and the Lord has commanded him to be prince over his people, because you have not kept what the Lord commanded you."
Matthew Henry's Commentary on 1 Samuel 13:12-14
Commentary on 1 Samuel 13:8-14
(Read 1 Samuel 13:8-14)
Saul broke the order expressly given by Samuel, see 1 Samuel 10:8, as to what should be done in cases of extremity. Saul offered sacrifice without Samuel, and did it himself, though he was neither priest nor prophet. When charged with disobedience, he justified himself in what he had done, and gave no sign of repentance for it. He would have this act of disobedience pass for an instance of his prudence, and as a proof of his piety. Men destitute of inward piety, often lay great stress on the outward performances of religion. Samuel charges Saul with being an enemy to himself. Those that disobey the commandments of God, do foolishly for themselves. Sin is folly, and the greatest sinners are the greatest fools. Our disposition to obey or disobey God, will often be proved by our behaviour in things which appear small. Men see nothing but Saul's outward act, which seems small; but God saw that he did this with unbelief and distrust of his providence, with contempt of his authority and justice, and with rebellion against the light of his own conscience. Blessed Saviour, may we never, like Saul, bring our poor offerings, or fancied peace-offerings, without looking to thy precious, thy all-sufficient sacrifice! Thou only, O Lord, canst make, or hast made, our peace in the blood of the cross.