《黄帝内经·灵枢·本藏》
但是你讲的不是我所问的，我想了解的是有的人从来不生病，而且可以享尽自然寿命，即便有忧愁、恐惧、惊吓等强烈的情志刺激，也不能使五脏虚弱，严寒酷热的外邪，也不会损伤五脏；有的人不离开掩蔽严密的居室，也没有惊恐等情志刺激，却不能避免发生疾病，这是为什么呢？
然非余之所问也，愿闻人之有不可病者，至尽天寿，虽有深扰大恐，怵惕之志，犹不能减也，甚寒大热，不能伤也；其有不离屏蔽室内，又无怵惕之恐，然不免于病者，何也？
But what you have said is not what I have asked. I wish to know why some people are never ill, and can exhaust their natural span of life, without any disease of the viscera following on grief, fear, or terror; or from exposure to severe heat or cold. Why do others, who never quit the shelter of their lofty chambers, and are free from such emotions, fail to escape disease?