From 1924 to 1927 Katherine Tingley sponsored a series of private studies in The Secret Doctrine, with Dr. de Purucker as lecturer. This record of the meetings provides an excellent introduction to H. P. Blavatsky's masterwork, yet it stands on its own as a clear restatement of the philosophy expounded by all great thinkers and sages.

Beginning with the three fundamental postulates of the SD, the presentation moves to cosmic and human evolution, with emphasis on the interconnectedness of all beings. Other topics include man's nature and destiny; avataras and buddhas; initiation, the Mysteries, and ethical values.

Gottfried de Purucker (1874-1942), was born in Suffern, New York, son of a prominent Anglican minister who for some years served as a chaplain of the American Church in Geneva, Switzerland. Educated there in the College de Geneve as well as by private tutors, Dr. De Purucker specialized in Hebrew and Greek in preparation for ministry. Later, he gained proficiency in other languages as well, including Sanskrit.