1st Samuel 13:12 Therefore said I, The Philistines will come down now upon me to Gilgal, and I have not made supplication unto the Lord: I forced myself therefore, and offered a burnt offering.
[Patriarchs & Prophets pp 621] Samuel's countenance was full of anxiety and trouble; but to his inquiry, “What hast thou done?” Saul offered excuses for his presumptuous act. He said: “I saw that the people were scattered from me, and that thou camest not within the days appointed, and that the Philistines gathered themselves together at Michmash; therefore said I, The Philistines will come down now upon me to Gilgal, and I have not made supplication unto the Lord: I forced myself therefore, and offered a burnt offering.
“And Samuel said to Saul, Thou hast done foolishly: thou hast not kept the commandment of the Lord thy God, which He commanded thee: for now would the Lord have established thy kingdom upon Israel forever. But now thy kingdom shall not continue: the Lord hath sought Him a man after His own heart, and the Lord hath commanded him to be captain over His people.... And Samuel arose, and gat him up from Gilgal unto Gibeah of Benjamin.”
Either Israel must cease to be the people of God, or the principle upon which the monarchy was founded must be maintained, and the nation must be governed by a divine power. If Israel would be wholly the Lord's, if the will of the human and earthly were held in subjection to the will of God, He would continue to be the Ruler of Israel. So long as the king and the people would conduct themselves as subordinate to God, so long He could be their defense. But in Israel no monarchy could prosper that did not in all things acknowledge the supreme authority of God.
1st Samuel 13:13 And Samuel said to Saul, Thou hast done foolishly: thou hast not kept the commandment of the Lord thy God, which he commanded thee: for now would the Lord have established thy kingdom upon Israel for ever. 14 But now thy kingdom shall not continue.
May God add His blessing to the study of His word. "Good night" and God bless!