when the abyss of sickness and death opens within us and we have no longer any resistance to offer to the tumult with which the world and our own body rush upon us, then to endure even the tension of our own muscles, the shudder that freezes us to the marrow, then even to keep ourselves motionless in what we ordinarily regard as nothing but the simple negative position of a lifeless thing requires, if we wish our head to remain erect and our eyes calm, an expense of vital energy and becomes the object of an exhausting struggle.
