Falko quoted The Dark Forest by Cixin Liu (Remembrance of Earth's Past)
This is the second novel in the "Remembrance of Earth’s Past" near-future trilogy. Written by …
He now understood that the Wallfacers had a mission far weirder than any in history, its logic cold and twisted, yet unyielding as the chains that bound Prometheus. It was an unliftable curse impossible for the Wallfacers to break under their own strength.
— The Dark Forest by Cixin Liu (Remembrance of Earth's Past) (Page 116)