This is a placeholder for a future profile of Joel Goldsmith. Several Unity ministers who are well steeped in Fillmore teachings have praised Goldsmith’s writings on mysticism.
According to Wikipedia, Joel Solomon Goldsmith (March 10, 1892 – June 17, 1964) was an American spiritual author, teacher, spiritual healer, and modern-day mystic. He founded The Infinite Way movement.
The University of Chicago Library Special Collections Research Center has a 3 box collection of Joel Goldsmith papers. Here is a Guide to the Joel S. Goldsmith Papers 1949-1964. This PDF has an excellent biography of Joel Goldsmith.