It's In the "Seeing"

"It was a wonder to him now that he'd once failed to appreciate the beauty of this land. The trick of it, he'd lately realized, was to pay attention to the sky as part of the landscape. The rising sun was gilding high cottony clouds from below. In a few hours, as the light shifted upward, those clouds would send amethyst and turquoise shadows racing over the emerald ground, and their sweep across the land would reveal subtle undulations in the terrain that only appeared flat to the careless observer." Mary Doria Russell, Doc, page 287