This is a timely look at how to foster mutual understanding between believers and non-believers by viewing religion from an outsiders perspective. Depending on how one defines religion, there are thousands of religions in the world. Given such religious diversity, how can any one religion claim to know the truth? Nothing proposed so far has helped us settle which of these religions, if any, are true - until now. Former minister-turned-atheist John Loftus thinks we would all be better off if we reviewed any religion - including our own - with the informed skepticism of an outsider. For this reason, he has devised the outsider test for faith. He describes it as a variation of the Golden Rule - Do unto your faith what you do to other faiths. Essentially this means applying the same skepticism to our own beliefs as we do to others. At a time when the vast diversity of human belief systems is accessible to all, the outsider test of faith offers a rational means for fostering mutual understanding.