Exodus 3:19 (KJV) states, "And I am sure that the king of Egypt will not let you go, no, not by a mighty hand."

This verse occurs in the context of God commissioning Moses to lead the Israelites out of Egypt. In the preceding verses, God has identified Himself to Moses as the God of Abraham, Isaac, and Jacob, and has revealed his plan to rescue the Israelites from their oppression and lead them to the promised land. In this verse, God expresses His certainty that the king of Egypt will not willingly release the Israelites, even in the face of a mighty display of power.

One of the key themes in this passage is the sovereignty of God. Throughout the Bible, God is depicted as the ruler and authority over all the earth. Here, in the context of Israel's oppression and liberation, God's sovereignty is demonstrated as He confidently proclaims that the king of Egypt will not let the Israelites go. This reveals God's supreme power over earthly rulers and His control over the course of human history.

Another important theme in this verse is the fulfillment of prophecy. God's declaration that the king of Egypt will not release the Israelites, "no, not by a mighty hand," foreshadows the series of dramatic and miraculous events that will eventually lead to the Israelites' deliverance from Egypt. These events, including the ten plagues and the parting of the Red Sea, will ultimately fulfill God's prophecy and demonstrate His faithfulness to His promises.

The verse also speaks to the concept of divine intervention. By asserting that the king of Egypt will not let the Israelites go, "not by a mighty hand," God is indicating that He will personally intervene and exert His power to bring about the liberation of His people. This foreshadows the miraculous acts that will follow, demonstrating God's ability to overcome human resistance and fulfill His purposes.

Symbolically, the verse can be seen as a precursor to the later theme of redemption and salvation. The Israelites' captivation in Egypt can be understood as a metaphor for the bondage of sin, while their exodus represents the liberation and deliverance that God offers to His people. In this light, God's declaration that the king of Egypt will not release the Israelites without a mighty hand foreshadows the need for divine intervention in the process of redemption and the ultimate victory of God over the forces of evil.

Overall, Exodus 3:19 (KJV) encapsulates powerful themes of God's sovereignty, the fulfillment of prophecy, divine intervention, and redemption. It highlights the assurance of God's power over earthly rulers, the certainty of His plans coming to fruition, and the necessity of His direct involvement in the process of deliverance. As such, this verse serves as a powerful reminder of God's faithfulness and His ability to bring about His purposes in the world.