New Sun, Old Sun

New Sun, Old Sun was a book by the Andorian philosopher Chasinthrof zh’Mai. In 2379 when the Emperor Kahless was returned to Qo'noS to face Chancellor Martok after he had replaced himself with a hologram, Kahless told him that "Few things in life are surities, but one thing that never changes is that things change." Data pointed out that this aphorism was from New Sun, Old Sun. (TNG novel: A Time for War, A Time for Peace)