Pharaoh famously declared, 'I do not know the LORD!' (Exodus 5:2). God’s response here is not just a threat, but a profound identity reveal.
God’s declaration, 'By this you shall know that I am the LORD,' is incredibly significant. In Hebrew, 'LORD' (YHWH) is connected to the verb 'to be.' It signifies God's eternal, self-existent nature. Pharaoh's ignorance of God is met with a demonstration that reveals God’s sovereign power over creation and His unique identity. This isn't just about demonstrating power; it's about revealing His very being. He is the One who IS, the one who causes all things to exist and to be what they are. By turning the lifeblood of Egypt, the Nile, into actual blood, God shows that He is the ultimate reality behind all existence, including the natural forces Pharaoh relied on.