*"For what Ruskin said of the difference* between a great painter, like Tintoretto, and a low painter, like Teniers, holds for every manifestation of life: the inferior painter, not recognizing the difference between high and low, *between what is intensely moving and what is emotionally inert, gives every part of his painting the same refinement of finish, the same care of detail. The great painter, on the other hand, knows that life is too short to treat every part of it with equal care: so he concentrates on the passages of maximum significane and treats hastily, even contemptuously, the minor passages: his shortcuts and simplifications are an effort to give a better account of what matters. This reduction of essentials is the main art of life."*
"Conduct of Life" (1951,Mumford) http://books.google.com/books?id=YQmxAAAAIAAJ&q=%22essentials+is+the+main+art+of+life%22&dq=%22essentials+is+the+main+art+of+life%22&hl=en&sa=X&ei=nXbdT4_ZH6fN6QGkiaWrCw&ved=0CDkQ6AEwAA
