Even a web site like “Mercury: Your Daily Emerald Blog,” which is a hodgepodge of New Age, self-centered tripe, can get it right now and then. Or, at least, come close. A 2016 blog on the site offered “7 Lessons from Famous People About Forgiving Others.” The “famous people” ranged from Jennifer Aniston to Joel Osteen to Oprah Winfree to Nelson Mandela. And the reasons the celebrities talked about forgiveness varied as much as the…