People aren’t books, I’ve learned.
You can’t bookmark your favorite pieces
to return to whenever you’re feeling lonely;
when the nights get too cold and you
need something familiar to keep you warm,
you can’t reopen their spines and wear
out their pages and call that obsession love.
There is energy all around us. The energy is both yin and yang; positive energy and negative energy. Only a select few firebenders can separate these energies. This creates an imbalance. The energy wants to restore balance and in a moment the positive and negative energy come crashing back together. You provide release and guidance, creating lightning.
— When Iroh explains lightning generation to Zuko, he mentions balance
of energy within the body, a hint that Korra will learn this technique in Book 4
. (via avatartom