《旧唐书·列传·卷一百四十一》
人有上下四肢、脾肺肾肝心五脏，起床睡觉，呼气吸气，精神元气时衰时旺，通畅就生气血，显现就是神色，振动就有声音，这些就是人的正常现象。
人有四支五藏，一觉一寝，呼吸吐纳，精气往来，流而为荣卫，彰而为气色，发而为音声，此人之常数也。
Humans have four limbs, five internal organs: spleen, lung, kidney, liver, and heart, get up and sleep, exhale and inhale. Their energy and spirit sometimes decline and sometimes rise. When they are clear, they will be qi and blood; when they are manifested, they will be facial expressions; when they tremble, they will have sounds. These are all normal phenomena of human beings.