be of the essence

to be the most important thing for achieving success Time is of the essence because the building must be completed by June. For successful military strategy, secrecy is of the essence.

Common Names:

Name	Pronounced	Usage
Fabian	['feibjən]
Vera (2)	-	Albanian
Aiolos	-	Greek Mythology
Ahtahkakoop	-	Native American, Cree
Vivyan	VIV-ee-ən	English (Rare)
Imen	-	Arabic