"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.
"Running to him was real, the way he did it the realest thing he knew. It was all joy and woe, hard as diamond; it made him weary beyond comprehension. But it also made him free
John L Parker "Once a Runner".