In the ancient texts, during ancient times when the heavens and earth had just opened and the land began to stabilize, the sky would shine with countless shimmering clouds of thunder. This thundercloud had sent out lightning that had split apart the ancient oceans and resulted in the first life.
It can be said that the only reason there was the flesh and blood of today was because of the lightning of the past. This was why the power of thunder and lightning was best to train the strength of one’s own body.