Jesus tells His disciples to be ready for the final judgement, and illustrates his point with the parable of the ten bridesmaids and some more description of how those who obey will be sorted from those who don’t: Mark 13:32–37; Matthew 24:36–51; Luke 21:34–38; Matthew 25:1–46
Indeed, just as in Noah’s day, people would be caught unawares:
Matthew 24:37-39When the Son of Man returns, it will be like it was in Noah’s day. In those days before the flood, the people were enjoying banquets and parties and weddings right up to the time Noah entered his boat. People didn’t realize what was going to happen until the flood came and swept them all away. That is the way it will be when the Son of Man comes.
This would be different. the only people who will see this coming are those who believe, just as Noah did.