1 Thessalonians 5:1-3

I don’t think, friends, that I need to deal with the question of when all this is going to happen. You know as well as I that the day of the Master’s coming can’t be posted on our calendars. He won’t call ahead and make an appointment any more than a burglar would. About the time everybody’s walking around complacently, congratulating each other—“We’ve sure got it made! Now we can take it easy!”—suddenly everything will fall apart. It’s going to come as suddenly and inescapably as birth pangs to a pregnant woman.