Before destroying the earth of rampant sins with the flood, God commanded Noah to proclaim the judgment of the flood. But people did not believe what he said and ignored it. As a result, all people but Noah's family lost their lives. The same applies today. God unceasingly sends evangelists to people and warns that there are surely Heaven and Hell and there will be the last judgment. But if they do not listen and think 'Let me see what will happen', they will regret when they end this earthly life. But then, it will be too late (2 Corinthians 5:10; Hebrews 9:27).