Cassidy sought no euphoric interludes. They came, when they did, quite naturally and he was content to enjoy them privately. He ran not for crypto-religious reasons, but to win races, to cover ground fast. Not only to be better than his fellows, but better than himself. To be faster by a tenth of a second, by an inch, by two feet or two yards than he had been the week or year before. He sought to conquer the physical limitations placed upon him by a three-dimensional world (and if Time is the fourth dimension, that too was his province). If he could conquer the weakness, the cowardice in himself, he would not worry about the rest; it would come. Training was a rite of purification; from it came speed, strength. Racing was a rite of death; from it came knowledge. Such rites demand, if they are to be meaningful at all, a certain amount of time spent precisely on the Red Line, where you can lean over the manicured putting green at the edge of the precipice and see exactly nothing.
Anything else that comes out of that process is a by-product. Certain compliments and observations made Cassidy uneasy; he explained that he was a runner; just an athlete, really, with an absurdly difficult task. He was not a health nut, was not out to mold himself a stylishly slim body. He did not live on nuts and berries; if the furnace was hot enough, anything would burn, even Big Macs. He listened carefully to his body and heeded strange requests. Like a pregnant woman, he sometimes sought artichoke hearts, pickled beets, smoked oysters. His daily toil was arduous; satisfying on the whole, but not the bounding, joyous, nature romp described in the magazines. Other runners, real runners, understood it quite well.
-Once A Runner