A useful text to read if you have the time

Thinking about what Paul Chan meant when he said 'by being what it is, art cannot be what it wants to be' I have found the following text pretty helpful:

Thierry De Duve, 'Kant after Duchamp', chapter 1 'Art was a Proper Name'.

Its pretty hefty reading but contains a really interesting logic and route through the 'what is art?' problem.