The Bible tells us that the world will become as the days of Noah, when the Lord shall return. There is a countdown clock and we cannot be certain of how much time is left. The earth was corrupt, the earth was filled with violence. "And God said unto Noah, The end of all flesh is come before me; for the earth is filled with violence through them; and, behold, I will destroy them with the earth." He then instructed Noah to build the ark and gave him specific measurements and ways to build it. He told him to bring his family with him along with animals in the direction of which He said. He will make it rain. Noah proved faithful and righteous for all those years, in the face of constant ridicule.