The crucible ¹  is for refining ²  silver and the furnace ³  is for gold, likewise ⁴  the Lord tests ⁵  hearts.

As the crucible is for silver and the furnace is for gold, ¹  so a person ²  is proved ³  by the praise he receives. ⁴ 

Look, I have refined you, but not as silver; I have purified you ¹  in the furnace of misery.

After all, ¹  they are your people and your special possession ²  whom you brought out of Egypt, from the middle of the iron-smelting furnace. ³ 

You, however, the Lord has selected and brought from Egypt, that iron-smelting furnace, ¹  to be his special people ²  as you are today.

“Son of man, the house of Israel has become slag to me. All of them are like bronze, tin, iron, and lead in the furnace; ¹  they are the worthless slag of silver.

As silver is melted in a furnace, so you will be melted in it, and you will know that I, the Lord, have poured out my anger on you.’”

Those are the terms that I charged your ancestors ¹  to keep ²  when I brought them out of Egypt, that place which was like an iron-smelting furnace. ³  I said at that time, ⁴  “Obey me and carry out the terms of the agreement ⁵  exactly as I commanded you. If you do, ⁶  you will be my people and I will be your God. ⁷ 

As silver, bronze, iron, lead, and tin are gathered in a furnace so that the fire can melt them, so I will gather you in my anger and in my rage. I will deposit you there ¹  and melt you.