How do we know that true faith is different from false profession?

Throughout the book of James, a clear distinction is made between true faith and mere profession. In James 1:25-27, true religion is described as being characterized by a genuine love and care for others, particularly the vulnerable, and an effort to remain unspotted from the world. This contrasts starkly with the behavior of those who make false professions, typically reflected in their disregard for the suffering of others and their indulgence in sin. The heart of true faith is transformed by the grace of God, leading to actions that glorify Him. Conversely, a false profession lacks such evidence of grace and results in self-deception. The rich individuals mentioned in James 5 are examples of those whose lives contradict the attributes of a genuine believer.