At its key, A Course in Miracles is a channeled work, and its roots are shrouded in mystery. Helen Schucman, a medical psychiatrist, and Bill Thetford, a study psychologist, worked in the 1960s to transcribe the internal dictations that Schucman claimed to receive from an internal voice she determined as Jesus Christ. The procedure of receiving and recording these communications spanned seven years and led to the three-volume book called A Program in Miracles.