Every branch that beareth fruit, he purgeth it. -- JOHN 15:2.

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. -- If ye endure chastening, God dealeth with you as with sons, for what son is he whom the Father chasteneth not? But if ye be without chastisement, whereof all are partakers, then are ye bastards, and not sons. Now no chastening for the present seemeth to be joyous, but grievous: nevertheless afterward it yieldeth the peaceable fruit of righteousness unto them which are exercised thereby. Wherefore lift up the hands which hang down, and the feeble knees.

Mal.3:2,3.Rom.5:3-5. -Heb.12:7,8,11,12.