This indomitable self-confidence of Shackleton’s took the form of optimism. And it worked in two ways: it set men’s souls on fire; as Macklin said, just to be in his presence was an experience. It was what made Shackleton so great a leader. But at the same time, the basic egotism that gave rise to his enormous self-reliance occasionally blinded him to realities. He tacitly expected those around him to reflect his own extreme optimism, and he could be almost petulant if they failed to do so. Such an attitude, he felt, cast doubt on him and his ability to lead them to safety.
