" Kyerta,” she said, “is a revelation that causes your world to shift on its axis. It is a profound truth that, once you know it, inevitably alters your future, though it has already occurred and should, therefore, change nothing.”
She finished the braided dough, and set it aside with a sigh. Dusting off her hands, she sat down across from them and leaned into her arms.
“In your case, this kyerta comes in the form of your names,” she said. “You have lived your lives as Akos Kereseth and Cyra Noavek, when in fact, you are Akos Noavek and Cyra Kereseth.”
She sat back from the table.
Akos struggled to breathe.
Cyra let out a peal of laughter. "

― Veronica Roth , The Fates Divide (Carve the Mark, #2)