BLACK AND WHITE TURN IT ON, FACE THE NEW RELIGION. At the Weekly Standard Joseph Epstein's talking about American Presidents who are "believers" and American Presidents who are "unbelievers." All our Presidents have professed some sort of faith, of course, and Epstein himself -- overcome, perhaps, by a spasm of sequential thought, or a glance at his word count -- declares that "I do not know American history well enough to run through all 43 of our presidents, designating the believers and nonbelievers among them." But he recovers quickly, and says he