You end up exhausted and spent, but later, in retrospect, you realize what it all was for. The parts fall into place, and you can see the whole picture and finally understand the role each individual part plays. The dawn comes, the sky grows light, and the colors and shapes of the roofs of houses, which you could only glimpse vaguely before, come into focus.
What I Talk About When I Talk About Running (ed. Vintage, 2008) - ISBN: 9780307269478