Nine plagues came upon Egypt. Yet in those plagues the heart of Pharaoh had not been moved. The people remained in bondage. The tenth plague, the worst of all was about to come upon Egypt. This plague would result in the death of all the first-born. The cause of death was Pharaoh’s disobedience to the word of God. When God said, “let my people go,” Pharaoh said, “I will not let thy people go.” Rebellion against God has dire consequences. Paul speaks clearly about this, when he says, “the wages of sin is death” (Romans 6:23).