his workmanship will be evident, because the Day will bring it to light. It will be revealed with fire, and the fire will prove the quality of each man’s work.
KJV
Every man’s work shall be made manifest: for the day shall declare it, because it shall be revealed by fire; and the fire shall try every man’s work of what sort it is.
ASV
each man’s work shall be made manifest: for the day shall declare it, because it is revealed in fire; and the fire itself shall prove each man’s work of what sort it is.