The Fire Philosophers teach to destory your enemies with fire to ensure that they never return, the destruction of the circle of life.
This is representation of samsara in Buddhism. Samsara is the cycling through one rebirth after another within six realms of existence.
The Sanskrit terms for the six realms are:
Deva realm: God realm
Asura realm: Demi-god realm
Manuṣya realm: Human realm
Tiryagyoni realm: Animal realm
Preta realm: Hungry Ghost realm
Naraka realm: Hell realm