Every branch in Me that does not bear fruit He takes away. 

He is like a refiner’s fire and like launderers’ soap. He will sit as a refiner and a purifier of silver; He will purify the sons of Levi, and purge them as gold and silver, that they may offer to the Lord an offering in righteousness.We also glory in tribulations, knowing that tribulation produces perseverance; and perseverance, character; and character, hope. Now hope does not disappoint, because the love of God has been poured out in our hearts by the Holy Spirit who has given to us. § If you endure chastening, God deals with you as with sons; for what son is there whom a father does not chasten? But if you are without chastening, of which all have become partakers, then you are illegitimate and not sons… Now no chastening seems to be joyful for the present, but painful; nevertheless, afterward it yields the peaceable fruit of righteousness to those who have been trained by it. Therefore strengthen the hands which hang down, and the feeble knees.