What does Exodus 10:20 mean?
The final words regarding the eighth plague (Exodus 7:21; 8:6, 17, 24; 9:6, 10, 24; 10:14) follow a familiar pattern. Several times, Egypt's Pharaoh broke his promise to release Hebrew slaves (Exodus 8:15, 31–32; 9:34–35). Eventually, this led to a terrible form of judgment (Proverbs 29:1): becoming a warning to all of history. God has now begun to ensure that Pharaoh rejects Israelite freedom (Exodus 10:1–2). From now on, Egypt's king will suffer the consequences of his constant stubbornness, without any meaningful hope to avoid judgment (Exodus 10:27; 11:10; 14:4).It's important to note all that happened before this moment. God predicted that He would make Pharaoh resistant (Exodus 4:21), so that the world would see proof of divine power (Exodus 3:20; 7:3–5). Up until now, obstinance and disobedience have been Pharaoh's own choice—with only one exception (Exodus 9:12). He has been described as being "hardened" or "having" a stubborn will numerous times (Exodus 7:13, 14, 22; 8:19). The Lord's choice to use Pharaoh as an illustration of divine wrath was brought on by Pharaoh's own free will.