Contributed by David Carrier / To be a happy art critic, perhaps you need to be ready to fall in love – at least with a picture. I have a friend, a very distinguished intellectual, who some years ago fell in love with a famous work of art. He has read all the literature about this picture, written about it, and made repeated pilgrimages to see it. On one occasion, curious about his obsession, I accompanied him to take a look. I certainly admire his picture…