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.

Urs Fischer specializes in making jaws drop. Cutting giant holes in gallery walls, digging a crater in Gavin Brown's gallery floor in 2007, creating amazing hyperrealist wallpaper for a group show at Tony Shafrazi: It all percolates with uncanny destructiveness, operatic uncontrollability, and barbaric sculptural power.

When people in stadiums do the Wave, it's the group-mind collective organism spontaneously organizing itself to express an emotion, pass time, and reflect the joy of seeing the rhythms of many as one, a visual rhyming or music in which everyone senses where the motion is going.

Giant group events are distorting organisms: You can like and hate them in rapid succession.

Yes, 85 percent of the art you see isn't any good. But everyone has a different opinion about which 85 percent is bad. That in turn creates fantastically unstable interplay and argument.

The very paradigm of revolution, of right versus wrong, good versus bad, is a relic with no bearing on the present. Yet artists, exhibitions, and curators valorize the sixties. People who wrote about these artists 30 years ago still write about them in the same ways, often for the same magazines.

Art is changing. Again. Here. Now. Opportunities to witness this are rare, so attend and observe.