The angel of the Lord in the Old Testament represents pre-incarnate appearances of Jesus Christ, demonstrating His presence throughout biblical history. This divine figure speaks with God's authority, makes divine promises, and is recognized as God Himself by those who encounter Him. This understanding helps explain how people could see and interact with God in physical form while maintaining the truth that no one can see God the Father directly. This revelation showcases Christ's complete nature as both merciful Savior and mighty Judge, from His compassionate interaction with Hagar to His role in divine judgment.