What does the Bible say about choosing a king?

In 1 Samuel 16, God instructs Samuel not to look at the outward appearance of a king, emphasizing that God sees the heart. This story illustrates that God reject Saul, who appeared kingly, due to his disobedience. He is teaching us that true leadership, particularly in a spiritual sense, is not found in external qualities but in the character that aligns with God's will. Samuel's mourning for Saul was a misunderstanding of God’s choices; God was preparing to anoint David, a man after His own heart. This passage underscores the importance of seeking God's perspective rather than relying on mere human judgment.