 He felt that it was important that he learn to take care of his own health, since so many doctors had been unable to help him.During his years of practicing in hermitages he also studied Sasang Constitutional Medicine (SCM) under two renowned acupuncturist/herbalists.One of them was so impressed with Sunim's diligence and special skills in quickly understanding the principles of SCM that when he retired from his practice he gave all his journals and notes to Sunim for his own reference.