According to the moral absolutism that characterizes McCandless's beliefs, a challenge in which a successful outcome is assured isn't a challenge at all.
Jon KrakauerHaving stumbled upon a tolerable career, for the first time in my life I was actually living above the poverty line. My hunger to climb had been blunted, in short, by a bunch of small satisfactions that added up to something like happiness.
Jon KrakauerHours slide by like minutes. The accumulated clutter of day-to-day existence — the lapses of conscience, the unpaid bills, the bungled opportunities, the dust under the couch, the inescapable prison of your genes — all of it is temporarily forgotten, crowded from your thoughts by an overpowering clarity of purpose and by the seriousness of the task at hand.
Jon Krakauer