James shows us that saving faith always produces works of obedience to the Lord. Knowledge of orthodox beliefs doesn’t save, even as demons who know the truth about God are not saved.
James shows us the seriousness of discrimination against the needy and the failure to love neighbor as oneself. To fail the test of love is to fail the test of faith. Faith and love always go hand in hand.
James gives us two acid tests for a legitimate devotion to God (“pure and undefiled religion”): mouth and mercy. The people of God direct our mouths toward good and godly things and we show mercy to those in distress.