It is quite obvious that Mr. Barnes does not understand the concept. He begins by offering a false choice of too many rules or no rules. Not surprisingly, Barnes then concludes that there is only one path; one rule:
The good news — really, the only Gospel worth preaching — is that Christ restored the game. Anyone can play, if they so desire. He stripped away the thousands of rules, and gave us back the One Good Rule. He is the voice crying out in the wilderness, “The asphalt is lava!” He has found the lost sheep; the adventure of childhood. St. Augustine summed up his One Rule better than any one else: “Love God, and do what you want.”The "one true path" has been the claim of every huckster in history. Joseph Smith, L. Ron Hubbard and Sun Myung Moon have claimed this monopoly on wisdom.
The sheer arrogance of some Christian fundamentalists is appalling. Hindu, Hebrew and Greek philosophers have a few thousand years on Christianity. In Barnes' simplistic world, we are to dismiss, as irrelevant, what came before a radical Jewish rabbi was crucified. Sure.