"If you slip or have a minor spill, don't interrupt your momentum but even as you right yourself recover the rhythm of your walk. Take note of the circumstances of your fall, but don't allow your body to brood on the memory. The body always tries to make itself interesting by its shivers, its breathlessness, its palpitations, its shudders, sweats, and cramps. But it is very sensitive to its master's scorn and indifference. If it feels he is not fooled by its jeremiads, if it understands that enlisting his pity is a useless effort, then it falls back into line and compliantly accomplishes its task. "