Early in the morning Samuel got up and went to meet Saul, but he was told, "Saul has gone to Carmel. There he has set up a monument in his own honor and has turned and gone on down to Gilgal."
When Samuel reached him, Saul said, "The LORD bless you! I have carried out the LORD's instructions."
But Samuel said, "What then is this bleating of sheep in my ears? What is this lowing of cattle that I hear?"
Saul answered, "The soldiers brought them from the Amalekites; they spared the best of the sheep and cattle to sacrifice to the LORD your God, but we totally destroyed the rest." 1 Samuel 15:12-15
Samuel spent the better part of the night crying out to the Lord and immediately we see the results of that action: wisdom and mild sarcasm wrapped inside of a rebuke. What's interesting, though, is that initially Saul doesn't realize he's done anything wrong. In fact, he seeks to try to justify what he and his men did.
We're not leaders of nations, but we do the same thing. We always want to be right, and it takes some time before we'll admit our mistakes. It's that way for me. I go out of my way to to prove I was right. Often. And sadly.
Again, we need God's strength to recognize truth and to act accordingly and swiftly, even when the evidence is against us being right ("what's that bleating I hear, Saul?").