Early-twentieth-century abstraction is art's version of Einstein's Theory of Relativity. It's the idea that changed everything everywhere: quickly, decisively, for good.

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.

I don't plan out my visits rigorously, but I do have a list of about 125 New York galleries, alternative spaces, museums, and so forth that I visit regularly. That's the closest thing I have to a strategy: I go to a lot of places, many that artists don't visit.

Now people look at 'The Scream' or Van Gogh's 'Irises' or a Picasso and see its new content: money. Auction houses inherently equate capital with value.

Art usually only makes the news in America when the subject is money.

The last time money left the art world, intrepid types maxed out their credit cards and opened galleries, and a few of them have become the best in the world.

As I went through 'This Progress,' one of two performance pieces by Tino Sehgal that transform Frank Lloyd Wright's emptied-out spiral into a dreamy Socratic-purgatorial journey, the museum literally fell away. I was suspended in some weird nonspace.