“if there is a point to being in the canyon, it is not to rush but to linger, suspended in a blue-and-amber haze of in-between-ness, for as long as one possibly can. To float, to drift, savoring the pulse of the river on its odyssey through the canyon, and above all, to postpone the unwelcome and distinctly unpleasant moment when one is forced to reemerge and reenter the world beyond the rim-that is the paramount goal.”