1 Thessalonians 5:2-6

Goodspeed(i) 2 for you yourselves know perfectly well that the Day of the Lord is to come like a thief in the night. 3 When people say, "What peace and security!" then suddenly destruction will be upon them, like birth-pains upon a woman about to give birth to a child, and there will be no escape. 4 But you are not in darkness, brothers, so that that Day should surprise you like thieves. 5 You all belong to the light and the day. We have nothing to do with night or with darkness. 6 So we must not sleep like other men, but we must be vigilant and composed.