Malachi 3:3 says: "He will sit as a refiner and purifier of silver."
  This verse puzzled some women in a Bible study and they wondered 
  what this statement meant about the character and nature of God. One 
  of the women offered to find out the process of refining silver and 
  get back to the group at their next Bible Study.
 
  That week, the woman called a silversmith and made an appointment to 
  watch him at work. She didn't mention anything about the reason for 
  her interest beyond her curiosity about the process of refining 
  silver. As she watched the silversmith, he held a piece of silver 
  over the fire and let it heat up. He explained that in refining 
  silver, one needed to hold the silver in the middle of the fire 
  where the flames were hottest as to burn away all the impurities. 
  The woman thought about God holding us in such a hot spot then she 
  thought again about the verse that says: "He sits as a refiner and 
  purifier of silver." She asked the silversmith if it was true that 
  he had to sit there in front of the fire the whole time the silver 
  was being refined. The man answered that yes, he not only had to sit 
  there holding the silver, but he had to keep his eyes on the silver 
  the entire time it was in the fire. If the silver was left a moment 
  too long in the flames, it would be destroyed. The woman was silent 
  for a moment. Then she asked the silversmith, "How do you know when 
  the silver is fully refined?" He smiled at her and answered, "Oh, 
  that's easy - when I see my image in it."
 
  If today you are feeling the heat of the fire, remember that God has 
  His eye on you and will keep watching you until He sees His image in 
  you.