6. others—Greek, "the rest" of the world: the unconverted (1Th 4:13). "Sleep" here is worldly apathy to spiritual things (Ro 13:11; Eph 5:14); in 1Th 5:7, ordinary sleep; in 1Th 5:10, death.
watch—for Christ's coming; literally, "be wakeful." The same Greek occurs in 1Co 15:34; 2Ti 2:26.
be sober—refraining from carnal indulgence, mental or sensual (1Pe 5:8).