'Suddenly' in the Bible

Then we who are alive, who are left, will be suddenly caught up together with them in the clouds to meet the Lord in the air. And so we will always be with the Lord.

For you yourselves know perfectly well that the day of the [return of the] Lord is coming just as a thief [comes unexpectedly and suddenly] in the night.

When people say, "There is peace and security," destruction will strike them as suddenly as labor pains come to a pregnant woman, and they will not be able to escape.