American Landscape Painter George Inness (1825-1894) wrote: "A work of art must have subtlety of tone and a certain amount of mystery that can never be seen at first glance. It must be looked at a long time before its subtle tones can be grasped; and if it is great, it grows upon you, and the longer you look, the more you see, and to describe it is almost impossible, because you never see it twice a like. It changes with your mood. It is a thing to live with. You study it; you learn to see the soul of it. It is like a face that becomes beautiful because you have learned to know and love the soul behind it. When a picture gives you this effect, it is great art."
What a beautiful statement!