the heat that drives the light (the fire it ignites) (джен)

“You must know the pain of losing a favored child. By sacrificing your own!”
 
Slowly, Father bows, until his forehead is touching the ground in respect. In obedience.
"If the Fire Lord commands it,” Father says, his voice ringing in her ears, “it will be done."
Or: Azulon asks Ozai to kill his daughter instead of his son. Ozai is loyal and obedient. His children, faced with a murderous father, are not.