The thinking of John Cage derived from Duchamp and Dada. I was not interested in that.
One usually understands the art of the past by applying the conventions of the present thus misunderstanding the art of the past.
Conceptual art is only good if the idea is good.
Artists teach critics what to think. Critics repeat what the artists teach them.
What the work of art looks like isn't too important.
Buying books was a way anyone could acquire a work of art for very little.