法苑珠林 4.97

4.97

易稽覽圖曰。陰陽和合其電耀耀也。其光長。春秋元命包曰。陰陽激為電。史記天官書。電者陰陽之動也。

The Yi jilan tu says: "When yin and yang harmonize, their lightning flashes brilliantly, and its light is long." The Chunqiu yuanming bao says: "The clash of yin and yang forms lightning." The "Tianguan shu" of the Shiji says: "Lightning is the movement of yin and yang."