1 Thessalonians 5:2-6

For you already know quite well that the day of the Lord will come unexpectedly and as a complete surprise. For while some are saying, “Finally we have peace and security,” sudden destruction will arrive at their doorstep, like labor pains seizing a pregnant woman—and with no chance of escape! But you, beloved brothers and sisters, are not living in the dark, allowing that day to creep up on you like a thief coming to steal. For you are all children of the light and children of the day. We don’t belong to the night nor to darkness. This is why we must not fall asleep, as the rest do, but keep wide awake and clearheaded.