2nd, To Produce Persevering Faith. “For you know that the testing of your faith produces steadfastness” (James 1:3, ESV). Now the proving of your faith is not for God’s benefit. God knows about your faith already. The proving of your faith is for your benefit. “Steadfastness” (ESV) or “patience” (NKJV) is from the Greek, hupomone—“endurance, fortitude, steadfastness, perseverance” (BAGD); “capacity to continue to bear up under difficult circumstances” (Louw-Nida). It means endurance under strong pressure.
Note the verb, “produces,” from katergazomai—“bring about, produce, create” (BAGD); “‘to accomplish, to perform successfully, to do thoroughly’” (Louw-Nida). This means that the testing of your faith in Christ produces patience and perseverance effectively and completely. The verb tense is present tense. The testing of your faith in Christ produces steadfastness in Christ continually.
Remember Job’s wife? I can imagine she must have been a great Sunday School teacher and a wonderful Bible study leader. She must have been a faithful wife to Job and a loving mother to her kids. But then one day, she lost all her young sons and daughters. One day, she lost all her money. One day, she saw Job covered with boils from head to foot. Trials and troubles and tragedy struck her like lightning! Then she said to Job, “Why do you keep on trusting God? Why not curse God and die?” (I have often wondered which trial is worse—losing your children or living with a wife who wants you to curse God and die.) She went through the worse trials. But she failed the test.
When you trust God and serve Him because things are good, you are serving Him for the wrong reason. “We are not to serve God because things are good, we are to serve God because God is good.”
Listen! If your faith in Christ is lacking understanding, shallow, lacking depth in the Word, and merely emotional, then the testing of your faith will break you! But if your faith in Christ is genuine, the testing of your faith will build you in Christ! It will make you endure under pressure. It will make you steadfast and persevering in Christ.
Perseverance in Christ is but an outward confirmation of an inward affirmation of the Word in your heart. Your steadfastness in Christ is an outer picture of the inner reality of your eternal security in Christ. It is the product of genuine faith in Christ. The persevering faith is a genuine faith. Thus, the truly saved believer is the truly persevering believer.
 James Merritt, “When Your Faith Goes on Trial,” http://www.sermonsearch.com. Accessed July, 2009.