God gave Noah the exact dimensions of the ark and explicit directions in regard to the construction of it in every particular. In many respects it was not made like a vessel but prepared like a house, the foundation like a boat which would float upon water. There were no windows in the sides of the ark. It was three stories high, and the light they received was from a window in the top. The door was in the side. The different apartments prepared for the reception of different animals were so made that the window in the top gave light to all. The ark was made of the cypress or gopher wood, which would know nothing of decay for hundreds of years. It was a building of great durability, which no wisdom of man could invent. God was the designer, and Noah His master builder. SR 63.3
After Noah had done all in his power to make every part of the work correct, it was impossible that it could of itself withstand the violence of the storm which God in His fierce anger was to bring upon the earth. The work of completing the building was a slow process. Every piece of timber was closely fitted, and every seam covered with pitch. All that men could do was done to make the work perfect; yet, after all, God alone could preserve the building upon the angry, heaving billows, by His miraculous power. SR 64.1
A multitude at first apparently received the warning of Noah, yet did not fully turn to God with true repentance. There was some time given them before the Flood was to come, in which they were to be placed upon probation—to be proved and tried. They failed to endure the trial. The prevailing degeneracy overcame them, and they finally joined others who were corrupt in deriding and scoffing at faithful Noah. They would not leave off their sins but continued in polygamy and in the indulgence of their corrupt passions. SR 64.2
The period of their probation was drawing near its close. The unbelieving, scoffing inhabitants of the world were to have a special sign of God's divine power. Noah had faithfully followed the instructions God had given to him. The ark was finished exactly as God had directed. He had laid in store immense quantities of food for man and beast. And after this was accomplished, God commanded the faithful Noah, “Come thou and all thy house into the ark; for thee have I seen righteous before Me.” SR 64.3