"I painted a painting called 'Milk River' [in 1963] Cows don't give milk if they don't have grass and water Tremendous meaning of that is that painters can't give anything to the observer People get what they need from a painting The painter need not die because of responsibility When you have inspiration and represent inspiration The observer makes the painting"
January 1, 1970
https://en.wikiquote.org/wiki/Agnes_Martin