James understood how critical God-given wisdom is for enduring trials (1:5). But he also knew the human tendencies to rely on self-guidance and worldly advice when tough times arise. In this section James reminds us that real faith produces gospel wisdom, which in turn produces gospel fruit. James shows us that our goodness comes from God-given wisdom, not our own human wisdom. We see that God's people are to be a community of fruitful, gospel wisdom in a world of envy, jealousy and selfish ambition.
When trials come, when you experience suffering, when life doesn't look like you hoped, what is your usual response? Is it joy and thankfulness? Shockingly, that's how James writes we should respond. How can we count it all joy when we meet trials of all kinds? These first four verses of James give away the theme of the entire letter - that God desires to use all we go through in life to complete and whole perfection, that we would lack in nothing, for His glory!