This quote makes me think of Ansel Adams' most famous photograph, taken spontaneously on Nov. 1, 1941 while driving to Santa Fe after a day-long photo shoot. He noticed the moon rising over the Sangre de Cristo Mountains, unloaded his camera, hastily calculated the proper exposure and snapped the shutter just as the setting sun lit the snowcapped peaks and glinted off the white crosses of a cemetery in the foreground.  The timing was so exact, Adams couldn't make a duplicate shot.  But his instincts were impeccable: The haunting "Moonrise, Hernandez, New Mexico," with its ghostly moon hanging over an old adobe church and graveyard, became his most popular single image.