God had declared concerning Pharaoh, “I will harden his heart, that he shall not let the people go.” Exodus 4:21. There was no exercise of supernatural power to harden the heart of the king. God gave to Pharaoh the most striking evidence of divine power, but the monarch stubbornly refused to heed the light. Every display of infinite power rejected by him, rendered him the more determined in his rebellion. The seeds of rebellion that he sowed when he rejected the first miracle, produced their harvest. As he continued to venture on in his own course, going from one degree of stubbornness to another, his heart became more and more hardened, until he was called to look upon the cold, dead faces of the first-born. (PP 268.1) MC VC

God speaks to men through His servants, giving cautions and warnings, and rebuking sin. He gives to each an opportunity to correct his errors before they become fixed in the character; but if one refuses to be corrected, divine power does not interpose to counteract the tendency of his own action. He finds it more easy to repeat the same course. He is hardening the heart against the influence of the Holy Spirit. A further rejection of light places him where a far stronger influence will be ineffectual to make an abiding impression. (PP 268.2) MC VC

He who has once yielded to temptation will yield more readily the second time. Every repetition of the sin lessens his power of resistance, blinds his eyes, and stifles conviction. Every seed of indulgence sown will bear fruit. God works no miracle to prevent the harvest. “Whatsoever a man soweth, that shall he also reap.” Galatians 6:7. He who manifests an infidel hardihood, a stolid indifference to divine truth, is but reaping the harvest of that which he has himself sown. It is thus that multitudes come to listen with stoical indifference to the truths that once stirred their very souls. They sowed neglect and resistance to the truth, and such is the harvest which they reap. (PP 268.3) MC VC

Those who are quieting a guilty conscience with the thought that they can change a course of evil when they choose, that they can trifle with the invitations of mercy, and yet be again and again impressed, take this course at their peril. They think that after casting all their influence on the side of the great rebel, in a moment of utmost extremity, when danger compasses them about, they will change leaders. But this is not so easily done. The experience, the education, the discipline of a life of sinful indulgence, has so thoroughly molded the character that they cannot then receive the image of Jesus. Had no light shone upon their pathway, the case would have been different. Mercy might interpose, and give them an opportunity to accept her overtures; but after light has been long rejected and despised, it will be finally withdrawn. (PP 269.1) MC VC

A plague of hail was next threatened upon Pharaoh, with the warning, “Send therefore now, and gather thy cattle, and all that thou hast in the field; for upon every man and beast which shall be found in the field, and shall not be brought home, the hail shall come down upon them, and they shall die.” Exodus 9:19. Rain or hail was unusual in Egypt, and such a storm as was foretold had never been witnessed. The report spread rapidly, and all who believed the word of the Lord gathered in their cattle, while those who despised the warning left them in the field. Thus in the midst of judgment the mercy of God was displayed, the people were tested, and it was shown how many had been led to fear God by the manifestation of His power. (PP 269.2) MC VC

The storm came as predicted—thunder and hail, and fire mingled with it, “very grievous, such as there was none like it in all the land of Egypt since it became a nation. And the hail smote throughout all the land of Egypt all that was in the field, both man and beast; and the hail smote every herb of the field, and brake every tree of the field.” Exodus 9:24, 25. Ruin and desolation marked the path of the destroying angel. The land of Goshen alone was spared. It was demonstrated to the Egyptians that the earth is under the control of the living God, that the elements obey His voice, and that the only safety is in obedience to Him. (PP 269.3) MC VC