1 Thessalonians 5:6
Therefore let us not sleep, as [do] others; but let us watch and be sober.
Note 25 at 1 Th. 5:6: As mentioned in note 24 at verse 5, those who are in darkness are unbelievers, and the metaphor is portraying them as being out of touch with reality. Therefore, this verse is admonishing us not to be as those in darkness. We are supposed to be awake and alert, looking for the return of the Lord.