《黄帝内经·灵枢·逆顺》
黄帝问伯高说：我听说气血运行有逆顺之别，脉象有盛衰表现，针刺方法有总的原则，我能知道这些道理吗？
黄帝问于伯高曰：余闻气有逆顺，脉有盛衰，刺有大约，可得闻乎？
The Yellow Emperor asked Bo Gao: I have heard that the flow of Qi and blood has its own ebb and flow, the pulses show signs of盛衰, and the methods of acupuncture have general principles. Can I know these principles?