Most ideas that are successful are ludicrously simple. Successful ideas generally have the appearance of simplicity because they seem inevitable. In terms of idea the artist is free to even surprise himself. Ideas are discovered by intuition.

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

Artists of many diverse types began using simple forms to their own ends.

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

One should be intelligent enough to know when not to be too intellectual

Formal art is essentially rational.

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