Why did her heart stop?

Why, when she was done, did the world continue?

Why were insects still clicking and leaping and crawling?

Why were the flames he had created still dancing and burning?

Why did the water in the basin ripple where he knocked it?

Why did the wind surrounding his camp whistle,

Why did pebbles and dirt shift beneath his feet?

Why was the world not stopping, in reverence to her?

Why was the sun still glaring? Warming? Why was it giving life to all things that didn't matter while the only life he cared about anymore was gone.

Why was the world; the four nations, not joined now? Silent on their grief, alike in loss and pain, the like of which he thought impossible.

Why was there still a world for him when she wasn't in it?

Why would he ever want that?

Why was Zuko so...

Why could Zuko not understand even himself at this point?

Why was his mind a muddled mess, questioning and analysing and coming up blank?

Why was the world so dark now?

Except that's the only real answer he knows now.

He knows this one thing beyond any certainty.

And as his mind unravels, loosens and twists and turns,

This fact remains, implanted, keeping sane and insane at the same time.

Because she was his sun.

Why is there is no sun now?