The Sagulsan sect was founded by National Preceptor Beomil (810-889 A.D.) during the reign of King Munseong of Silla (r. 839-857 A.D.). At the time of the Nine Mountain Schools of Seon, the Sagulsan sect, which was located out of Gulsansa Temple in Gangneung, Gangwon-do, was the most prosperous of the nine. Beomil was also known as Pumil, and he received the posthumous title of Tonghyo. Beomil’s family name was Kim, and his mother belonged to the Ji clan. He was born in 810 A.D. after his mother was pregnant for an astounding thirteen months. When he was born, he was said to have a conch-tuft on top of his…