The image of the crucible and testing process is used throughout Scripture. It is especially popular in the OT. "The crucible is for silver and the furnace for gold, And a man is tested by the praise accorded him ..." (
Prov. 27:21). "Thou hast tried my heart; Thou hast visited me by night; Thou hast tested me and dost find nothing; I have purposed that my mouth will not transgress" (
Ps. 17:3). James' draws upon this idiom to illustrate the effect a trial has in our lives.
The crucible was used in firing or purifying metals for the sake of increasing their quality. A metallurgist would take a metal of some sort and put it in a crucible which he would in turn heat until it was liquid. At that point those elements that decreased the quality would rise to the surface and be removed. The process would be repeated until all the impurities were eliminated. Through a trial God removes the impurities of our faith. When the process is finished what's left is endurance.
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Some Bible versions translate this word as "patience," but in reality it means much more than the modern concept patience carries. It is more than bearing with someone or something and passively waiting on it to end or to go away. "Endurance" comes from two Greek terms, "to remain" and "under." Literally, it means "to stay under." It is best translated endurance, or steadfastness, or even staying power. This particular quality is the strength that allows one to remain under a weight or pressure until it is removed or has completed its purpose. This same quality was ascribed to Jesus, "fixing our eyes on Jesus, the author and perfecter of faith, who for the joy set before Him endured the cross ...." "Endurance" is what's left when the trial is past. In the end, the pressure of trials helps forge a faith that will go the distance no matter the difficulty. A trial draws out of us a greater trust in the nature and purposes of God. What result could bring more glory to God? What result could have more benefit to us? What result could be greater cause for rejoicing?
Consider this, when the nation of Israel departed Egypt and made their way through the sea, they only possessed a basic knowledge about their purpose and destination. They were going to worship God, and they were headed to the Promised Land. The specific direction and duration of their journey was unknown to them. There were many mysteries ahead. Despite this, their limitations and challenges were overcome by the knowledge of God's presence as they followed the cloud by day and the fire by night. At the time, knowing God's presence was more important than knowing God's specific purposes. A trial is similar. The specific purpose may only be known over time, but the trial itself let's us know that God is present. We are often unaware of where God is leading, but we know the journey is making us more able to follow. We can embrace trials because we know God is at work.