I'm intrigued by fanatics - people who are seduced by the promise, or the illusion, of the absolute.

This forms the nub of a dilemna that every Everest climber eventually comes up against: in order to succeed you must be exceedingly driven, but if you're too driven you're likely to die.

Early on a difficult climb, especially a solo climb, you’re hyper-aware of the abyss pulling at your back, constantly feeling its call, its immense hunger. To resist takes tremendous conscious effort, you don’t dare let your guard down for an instant. The void puts you on edge, makes your movements tentative and clumsy. But as the climb continues, you grow accustomed to the exposure, you get used to rubbing shoulders with doom, you come to believe in the reliability of your hands and feet and head. You learn to trust your self-control.

Above the comforts of Base Camp, the expedition in fact became an almost Calvinistic undertaking. The ratio of misery to pleasure was greater by an order of magnitude than any mountain I'd been on; I quickly came to understand that climbing Everest was primarily about enduring pain. And in subjecting ourselves to week after week of toil, tedium and suffering, it struck me that most of us were probably seeking above all else, something like a state of grace.

When you forgive, you love. And when you love, God’s light shines through you.

I think part of the appeal of Antarctica is experiencing some sort of power, the forces of the natural world.

The thing that is most beautiful about Antarctica for me is the light. It's like no other light on Earth, because the air is so free of impurities. You get drugged by it, like when you listen to one of your favorite songs. The light there is a mood-enhancing substance.