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.
There are these two things, then, that cannot change and about which God cannot lie. So we who have found safety with him are greatly encouraged to hold firmly to the hope placed before us.
These were the spirits of those who had not obeyed God when he waited patiently during the days that Noah was building his boat. The few people in the boat—eight in all—were saved by the water,
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.