This chapter is based on Genesis 6; 7; 8 and 9:8-17.
The descendants of Seth were called the sons of God; the descendants of Cain, the sons of men. As the sons of God mingled with the sons of men, they became corrupt and, by intermarriage with them, lost, through the influence of their wives, their peculiar, holy character, and united with the sons of Cain in their idolatry. Many cast aside the fear of God and trampled upon His commandments. But there were a few that did righteousness, who feared and honored their Creator. Noah and his family were among the righteous few. SR 62.1
The wickedness of man was so great, and increased to such a fearful extent, that God repented that He had made man upon the earth, for He saw that the wickedness of man was great, and that every imagination of the thoughts of his heart was only evil continually. SR 62.2
More than one hundred years before the Flood the Lord sent an angel to faithful Noah to make known to him that He would no longer have mercy upon the corrupt race. But He would not have them ignorant of His design. He would instruct Noah and make him a faithful preacher to warn the world of its coming destruction, that the inhabitants of the earth might be left without excuse. Noah was to preach to the people, and also to prepare an ark as God should direct him for the saving of himself and family. He was not only to preach, but his example in building the ark was to convince all that he believed what he preached. SR 62.3
Noah and his family were not alone in fearing and obeying God. But Noah was the most pious and holy of any upon the earth, and was the one whose life God preserved to carry out His will in building the ark and warning the world of its coming doom. Methuselah, the grandfather of Noah, lived until the very year of the Flood; and there were others who believed the preaching of Noah, and aided him in building the ark, who died before the flood of waters came upon the earth. Noah, by his preaching and example in building the ark, condemned the world. SR 63.1
God gave all who chose an opportunity to repent and turn to Him. But they believed not the preaching of Noah. They mocked at his warnings and ridiculed the building of that immense vessel on dry land. Noah's efforts to reform his fellow men did not succeed. But for more than one hundred years he persevered in his efforts to turn men to repentance and to God. Every blow struck upon the ark was preaching to the people. Noah directed, he preached, he worked, while the people looked on in amazement and regarded him as a fanatic. SR 63.2