There is little in the political, social, and economic systems of the world which offers forgiveness, let alone guarantees it. There is little which champions compassion over commerce or kindness over power. Only Christianity affirms grace upon grace. Only Christianity affirms that no one is a lost cause to God, no matter how much they mess up or lack.
For James, discipleship wasn’t simply about following rules or traditions, or professing faith in Jesus Christ. Discipleship was about identity and action. If you know your God-given identity as a servant of Christ in your mind and heart, then you will act because you have to live out that identity in any and all contexts; it is in your nature to do so.