In conceptual art the idea or concept is the most important aspect of the work

Formal art is essentially rational.

Unless you're involved with thinking about what you're doing, you end up doing the same thing over and over, and that becomes tedious and, in the end, defeating.

A blind man can make art if what is in his mind can be passed to another mind in some tangible form.

The other great development has been in photography, but that too was influenced by Conceptual art.

Obviously a drawing of a person is not a real person, but a drawing of a line is a real line.

Artists teach critics what to think. Critics repeat what the artists teach them.