Authors:

Think of an abstract painting as very, very low relief - a thing, not a picture.

"Ask an Art Critic: Jerry Saltz Answers Your Questions About George Condo, Online Art Fairs, and What Abstraction Really Is" by Jerry Saltz, www.huffingtonpost.com. February 24, 2011.
Think of an abstract painting as very, very low relief - a thing, not a picture.