Quotes:Purucker, Gottfried de
Zirkoff, Boris
Purucker, Gottfried de (1874–1942). *The Esoteric Tradition. Point Loma, Calif.: Theosophical University Press, 1935. 2 vols.; xvi, 1109 pp. Index; 2nd ed., 1940.
Source: Boris de Zirkoff, «H. P. Blavatsky Collected Writings», vol. 9, p. 449