1 Peter 1:7

7.Much more precious than of gold The argument is from the less to the greater; for if gold, a corruptible metal, is deemed of so much value that we prove it by fire, that it may become really valuable, what wonder is it that God should require a similar trial as to faith, since faith is deemed by him so excellent? And though the words seem to have a different meaning, he yet compares faith to gold, and makes it more precious than gold, that hence he might draw the conclusion, that it ought to be fully proved. (11) It is moreover uncertain how far he extends the meaning of the words, “tried” δοκιμάζεσθαι and “trial” δοκίμιον

Gold is, indeed, tried twice by fire; first, when it is separated from its dross; and then, when a judgment is to be formed of its purity. Both modes of trial may very suitably be applied to faith; for when there is much of the dregs of unbelief remaining in us, and when by various afflictions we are refined as it were in God’s furnace, the dross of our faith is removed, so that it becomes pure and clean before God; and, at the same time, a trial of it is made, as to whether it be true or fictitious. I am disposed to take these two views, and what immediately follows seems to favor this explanation; for as silver is without honor or value before it be refined, so he intimates that our faith is not to be honored and crowned by God until it be duly proved.

At the appearing of Jesus Christ, or, when Jesus Christ shall be revealed. This is added, that the faithful might learn to hold on courageously to the last day. For our life is now hidden in Christ, and will remain hidden, and as it were buried, until Christ shall appear from heaven; and the whole course of our life leads to the destruction of the external man, and all the things we suffer are, as it were, the preludes of death. It is hence necessary, that we should cast our own eyes on Christ, if we wish in our afflictions to behold glory and praise. For trials as to us are full of reproach and shame, and they become glorious in Christ; but that glory in Christ is not yet plainly seen, for the day of consolation is not yet come. (12)