Malachi 3:3

    One can see the experienced refiner of precious metal. He made the fire; he knows how hot it should be; he knows when to put the metal into the fire, how long to leave it, and when to take it out. All the time he sits (unalarmed and untroubled) and waits for the purifying process to do its work. Our Lord Jesus (the refiner of his jewels) has come to this earth and finished the work given to him. He is exalted at his Father's right hand, seated until his church is called out and his enemies are made his footstool. This verse denotes his constant care over his people from the cradle to the grave. His eye is upon them at all times and in all their ways. He will purify these “sons of Levi,” for they are all priests; and he will purge them and try them that they may believe him, love him, worship him, and offer to him sacrifices of love, praise, and thanksgiving in righteousness. He made the fire; he knows how hot it should be; he knows when to put the gold into the fire, how long to leave it, and when to take it out. “But he knoweth the way I take; when he hath tried me, I shall come forth as gold” (Job 23:10).