For scientific leadership give me Scott; for swift and efficient travel, Amundsen; but when you are in a hopeless situation, when there seems no way out, get down on your knees and pray for Shackleton.

And in the space of a few short hours, life had been reduced from a highly complex existence, with a thousand petty problems, to one of the barest simplicity in which only one real task remained—the achievement of the goal.

he was simply emotionally incapable of forgetting—even for an instant—his position and the responsibility it entailed.