Sol-Chong grew up to become one of the ten Confucian sages of the Silla era. He is recognized for his scholarship in Chinese literature and history and for his adaptation of Idu, the system of using Chinese characters phonetically to record Korean songs and poems. As Korea had not yet developed an alphabet, this adaptation was very important. It made Chinese literature available to the general public by creating, in effect, a method for translation. Sol-Chong is said to have been the author of many original works; however, his Kye-Hwa-Wang is his only surviving work.
Shortly after his son was born, Won-Hyo left the palace and began traveling the country. He was recognized as a great scholar by the Dang Dynasty of China, although he never studied there, and he was highly respected by the people of Korea. He hated that different religions argued with each other over their different beliefs, so he created his own ideology in which the conflicts between various religions could be reconciled. In 661 AD, he experienced a revelation in his Buddhist philosophy and developed the Chongto-Gyo (Pure Land) sect. This sect did not require study of the Chinese Buddhist literature for salvation, but merely diligent prayer. His belief was that one could obtain salvation, or enter the "Pure Land," by simply praying. This fundamental change in Buddhist philosophy made religion accessible to the lower classes. It soon became very popular among the entire population. However, his most remarkable achievements were his efforts in relieving the poverty and suffering of ordinary people. In 662 AD, Won-Hyo left the priesthood and devoted the rest of his life to traveling the country teaching this new sect to the common people. Won-Hyo's contributions to the culture and national awareness of Silla were instrumental in the unification of the three kingdoms of Korea.
Won-Hyo died in 686 AD and was laid in state by his son Sol-Chong in Punhwang-Sa temple. He had seen the unification of the Three Kingdoms of Korea in his own lifetime and had helped to bring about a brilliant culture in Korea through his efforts in Buddhist philosophy. He had a profound influence on quality of life in Silla and on Buddhism in Korea, China, and Japan.