Today's portion reveals the type of man than Saul truly was. He was a man willing to be used by God (see 11:6) and was used to defeat the king of Ammon. This great victory solidified his kingship, and unified the nation of Israel. Saul was a great military leader, but he did not pay attention to the word of the Lord from the prophet Samuel. He was impatient and edgy, performing a religious sacrifice instead of waiting for Samuel. Saul seemed to think that spiritual matters were up for debate, that what the Lord told him through the prophet did not have to be fully obeyed.
In chapter 13, Saul is waiting to attack the Philistines and had his troops garrisoned at Gilgal. He was waiting for Samuel to come and bless them and offer a sacrifice. His troops, most likely sensing his anxiety, started to desert him, so he went ahead and offered the sacrifices himself. So while Saul was king, he thought that someone positioned him to be a prophet and a priest. Because of his impatience, the Lord declared through Samuel that Saul kingship would come to an early end (13:13-14).
In chapter 14, Jonathan, Saul's son, shows great acumen and bravery and manages to put the Philistines into chaos, killing each other. Because he had separated from Saul's camp and did this on his own, he was unaware of a foolish vow that Saul had placed his troops under - to refrain from eating until they had total victory. The vow was foolish and not realistic. But after the defeat of the Philistines, Saul discovers Jonathon's error and wants him to be killed - his own son - the one responsible for the victory over the Philistines. Jonathan's life is spared when the troops intervene.
Later, in chapter 15, Samuel comes to Saul and tells him to utterly destroy the Amalekites, every person, donkey, cow, goats, camel, everything. This is a direct word from God to Saul through Samuel. Saul defeats the Amalekites but does not kill their king. Additionally, he does not kill all the animals, keeping the choicest ones. Because of his disobedience, God "is sorry he ever made Saul king" (15:10). His kingdom is rejected forever. Sadly, Saul cannot see the error of his ways. He declares in verse 20, "But I did obey the Lord" even though Samuel has just presented evidence and explained to Saul the error of his way. In verse 22, Samuel tells Saul, "Listen! Obedience is better than sacrifice, and submission is better than offering the fat of rams."
Saul is typical of many religious leaders today. The Word of God is clear, but they choose their own interpretation. They think their works, their sacrifices, excuse their disobedience to the Word. Ultimately, like Saul, their kingdom is rejected.
May God bless you and bless the reading of His Word.