We call them “Masters” because they are our teachers; and because from them we have derived all the Theosophical truths, however inadequately some of… - Helena Blavatsky

The purpose of this book is exactly expressed in its title, “The Key to Theosophy,” and needs but few words of explanation. It is not a complete or exhaustive text-book of Theosophy, but only a key to unlock the door that leads to the deeper study.

The possible truths, hazily perceived in the world of abstraction, like those inferred from observation and experiment in the world of matter, are forced upon the profane multitudes, too busy to think for themselves, under the form of Divine revelation and scientific authority. But the same question stands open from the days of Socrates and Pilate down to our own age of wholesale negation: is there such a thing as absolute truth in the hands of any one party or man? Reason answers, "there cannot be." There is no room for absolute truth upon any subject whatsoever, in a world as finite and conditioned as man is himself. But there are relative truths, and we have to make the best we can of them.

We are in the Kali Yuga [Sanskrit term meaning Dark Age] and its fatal influence is a thousand-fold more powerful in the West than it is in the East; hence the easy preys made by the Powers of the Age of Darkness in this cyclic struggle, and the many delusions under which the world is now laboring. One of these is the relative facility with which men fancy they can get at the "Gate" and cross the threshold of Occultism without any great sacrifice. It is the dream of most Theosophists, one inspired by desire for Power and personal selfishness, and it is not such feelings that can ever lead them to the coveted goal. For, as well said by one believed to have sacrificed himself for Humanity--"Strait is the gate and narrow is the way which leadeth unto life" eternal, and therefore "few there be that find it." (Matthew 7:14) So strait indeed, that at the bare mention of some of the preliminary difficulties the affrighted Western candidates turn back and retreat with a shudder... Let them stop here and attempt no more in their great weakness. For if, while turning their backs on the narrow gate, they are dragged by their desire for the Occult one step in the direction of the broad and more inviting gates of that golden mystery which glitters in the light of illusion, woe to them!