'Forever' in the Bible

I also know that whatever God does will endure forever; nothing can be added to it, and nothing taken away from it. God has made it this way, so that men will fear him.

Even if a man fathers a hundred children and lives many years -- even if he lives a long, long time, but cannot enjoy his prosperity -- even if he were to live forever -- I would say, "A stillborn child is better off than he is!"