If you fight the dragon for too long, you will become a dragon yourself; If you stare at the abyss for too long, the abyss will stare back at you.

The moral is that every soldier fights for justice and keeps killing for justice, and its ultimate goal is only to end the battle with fighting, so there is no absolute justice and evil, or even an essential difference. People only see the light on the hero, but ignore the darkness behind him.

For various reasons, people may become what they hated and resisted at first.

Extended data:

The story of the dragon slayer who finally became a dragon.

There is a dragon that asks the village to sacrifice a virgin every year. Every year in this village, a young hero fights dragons, but no one lives.

When another hero set out, someone quietly followed. Longdong is full of gold and silver treasures. The hero stabbed the dragon with a sword, then sat on the corpse and looked at the glittering jewels, slowly growing scales, tails and tentacles, and finally became a dragon.

The stalker returned to the village and told the secret. He told people: first, we should unite to defeat the dragon; Second, be alert to every hero and don't let them fall under the attraction of treasure.

The stalker was hailed by the villagers as a "mentor" and led the villagers to defeat the dragon again. Under the close supervision of the villagers, the heroes who participated in the war did not degenerate and peace lasted for decades.