Therefore let us not sleep, as do others; but let us watch and be sober.
Others, х hoi (G3588) loipoi (G3062)] - 'the rest' of the world (1 Thessalonians 4:13). "Sleep" here is worldly apathy to spiritual things (Romans 13:11; Ephesians 5:14); in 1 Thessalonians 5:7, ordinary sleep; in 1 Thessalonians 5:10, death.
Watch - for Christ's coming [greegoromen]; 'be wakeful.'
Be sober - refraining from carnal indulgences, mental or sensual (cf. Greek, 1 Corinthians 15:34; 2 Timothy 2:26; 1 Peter 5:8).