《黄帝内经·素问·刺法论》
有了五脏之气护身之后，还要想象头顶上有北斗星的光辉照耀，然后才可以进入病室。
五气护身之毕，以想头上如北斗之煌煌，然后可入于疫室。
After the qi from the five organs protects the body, still need to imagine that there is radiance of the Northern Dipper above the head, then one can enter the sick room.