Minimal art went nowhere.

Most ideas that are successful are ludicrously simple

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

A work of art may be understood as a conductor from the artist's mind to the viewer's. But it may never reach the viewer, or it may never leave the artist's mind.

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.

Irrational judgements lead to new experience.

What the work of art looks like isn't too important.