《黄帝内经·素问·至真要大论》
岐伯说：仔细观察阴阳病变之所在，来加以调整，达到平衡为目的。正病用正治法，反病用反治法。
岐伯曰：谨察阴阳所在而调之，以平为期，正者正治，反者反治。
Qi Bo said: Carefully observe the location of the yin and yang changes, and adjust them accordingly, with the purpose of achieving balance. Use the right treatment for the right disease, and use the reverse treatment for the reverse disease.