Billions of photos are shot every year, and about the toughest thing a photographer can do is invent an original, deeply personal, instantly recognizable visual style. In the early nineties, Wolfgang Tillmans did just that, transforming himself into a new kind of artist-photographer of modern life.

Where Cezanne captured and intensified shards of the eternal (every pear far more sharply defined than it could be in life), Monet portrayed the changeability and flux of every moment. 'The Water Lilies' give you a jittery, amorphous sense of a world seen at the speed of light.

First let me report that the art in the Barnes Collection has never looked better. My trips to the old Barnes were always amazing, but except on the sunniest days, you could barely see the art. The building always felt pushed beyond its capacity.

Many say an art dealer running a museum is a 'conflict of interest.' But maybe the art world has lived an artificial or unintentional lie all of these years when it comes to conflicts of interest.

Once artists are expected to shock, it's that much harder for them to do so.

All great contemporary artists, schooled or not, are essentially self-taught and are de-skilling like crazy. I don't look for skill in art... skill has nothing to do with technical proficiency... I'm interested in people who rethink skill, who redefine or reimagine it: an engineer, say, who builds rockets from rocks.

In the late nineties, Katy Grannan began making haunting photographs of people who had extraordinary inner yens to be seen by strangers.