Occultism is concerned with the inner man, who must be strengthened and freed from the dominion of the physical body and its surroundings, which must become its servants. Hence the first and chief necessity of Chelaship is a spirit of absolute unselfishness and devotion to Truth; then follow self-knowledge and self-mastery.
H.P. Blavatsky, Lucifer Vol. 4, No. 22; June 15, 1889.