My favorite quote from an interview with Norman Bluhm (1921-1999):

Today a lot of painters, and a lot of abstract painters, don’t draw at all. They don’t even know how to draw. I’ve always thought that one of the great elements of great art is drawing. From the Renaissance to Matisse and Picasso, and even the Impressionists — every one of the greater painters could draw.

I think as you get older, your knowledge naturally increases. Your desires become, and I don’t mean this in a religious context, more spiritual. The work has become more spiritual. The desire is to create another kind of space, another form of color.