《伤寒论·辨太阳病脉证并治中》
凡是疾病，用发汗法，或涌吐法，或泻下法治疗，而致耗血、伤津液的，如果阴阳能够自趋调和的，就一定能够痊愈。
凡病若发汗、若吐、若下、若亡津液，阴阳自和者，必自愈。
Whenever a disease is treated with the diaphoretic method, or the vomiting method, or the laxative method, causing blood loss and damage to body fluid, if the yin and yang can spontaneously tend to be harmonious, it will definitely be cured.