As Jesus sat on the Mount of Olives, the disciples came to him in private. “Tell us when all this will be,” they asked, “and what will happen to show that it is the time for your coming and the end of the age.”
Then the sign of the Son of Man will appear in the sky; and all the peoples of earth will weep as they see the Son of Man coming on the clouds of heaven with power and great glory.
It was faith that made Noah hear God's warnings about things in the future that he could not see. He obeyed God and built a boat in which he and his family were saved. As a result, the world was condemned, and Noah received from God the righteousness that comes by faith.
God did not spare the ancient world, but brought the flood on the world of godless people; the only ones he saved were Noah, who preached righteousness, and seven other people.