David Hockney

"The moment you cheat for the sake of beauty, you know you're an
artist."
David Hockney
Source: http://www.brainyquote.com/quotes/authors/d/david_hockney.html

"If we are to change our world view, images have to change. The
artist now has a very important job to do. He's not a little peripheral figure
entertaining rich people, he's really needed."
David Hockney
Source: http://en.thinkexist.com/quotes/david_hockney/