Here's a good one from John Carlson, a great landscape painter: The sky is the key to the landscape. Its majesty permeates outdoor nature. It is the dictator of conditions and of moods--not alone the moods of nature, but our own as well. I know that there are men who never see the sky at all. A certain man of our hills at Woodstock once said: "You know, before you artists got here, I never used to see the sky."