Faith Saves What is the difference between Christianity and every other religion? It's the difference between "Do" and "Done." Every other religion, and even atheists will believe it's what I "do" that matters. Many religions have a system of good works to follow, and by obedience to that code you can have confidence for salvation. Those without God might stress the good lives they are living, and their allegiance to their moral code. Christians who know what Scripture says simply cannot go down that road. We know God wants perfection and judges our every thought. Perfect obedience is not possible.