President Bush tells us that he knows his White House counsel Harriet Miers' heart. I have no doubt that it is a good one. But a good heart does not a great Supreme Court justice make. In support of Miers' qualifications for the job, longtime Bush supporter Marvin Olasky reports that Texas Supreme Court Justice Nathan Hecht endorsed his one-time fellow parishioner Miers' heart. At Olasky's World magazine blog (www.worldmagblog.com),he writes: "Miers has been a member of Valley View Christian Church in Dallas for 25 years, where Hecht has been an elder. He calls it a 'conservative evangelical church ....