The Emperor believes that he is ordained by heaven to found a new dynasty to replace the Yi (Joseon) dynasty and that the new Chong dynasty will prosper for 800 years as predicted in the secret prophetic text, Chong-kam-rok, also known as Jeonggamnok. His dream is to be a ruler who will free the kingdom of foreign domination, military and cultural. The latter is presented as a seemingly impossible task, a struggle that would require "madness" to sustain over a lifetime. Sol Sun-bung, author of the preface to his English translation, noted that although Emperor's dream of becoming a ruler of the people failed in a practical sense, nonetheless at his death, he achieves "greater eminence by transcending all worldly preoccupations".