Malachi 3:2

Who may abide the day of his coming? and who shall stand when he appeareth? for he is like a refiner's fire, and like fullers' soap.

I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and peoples, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands. These are they which came out of great tribulation, and have washed their robes and made them white in the blood of the Lamb.

He is like a refiner's fire, and like fullers' soap: and he shall sit as a refiner and purifier of silver: and he shall purify the sons of Levi, and purge them as gold and silver, that they may offer unto the Lord an offering in righteousness.

We glory in tribulations: knowing that tribulation worketh patience; and patience, experience; and experience, hope: and hope maketh not ashamed; because the love of God is shed abroad in our hearts by the Holy Ghost which is given unto us.