QUOTE : Plodding slowly up the last few steps to the summit, I had the sensation of being underwater, of life moving at quarter speed. And then I found myself atop a slender wedge of ice, adorned with a discarded oxygen cylinder and a battered aluminum survey pole, with nowhere higher to climb. A string of Buddhist prayer flags snapped furiously in the wind. Far below, down a side of the mountain I had never laid eyes on, the dry Tibetan plateau stretched to the horizon as a boundless expanse of dun-colored earth.