Another Idiom - Chapter 13 - KH
I located another idiom on page 120. It reads:
"Like a single bird across a stormcloud sky, a tiny peace winged its way through the chaos inside his body."
This statement doesn't mean that peace actually flew inside his body but instead it means that the feeling of peace (calmness) came over him and soothed the turmoil he was feeling.
She understood the situation as peace winged its way into her heart.