"It happens that, in lands which have the European culture, almost the only way in which we can get the inner teaching put clearly before us is by coming into The Theosophical Society, or by reading Theosophical works. There have been mystical or spiritualistic works which have given some information, which have gone a long way, but there are none, so far as I know, which state the case so clearly, so scientifically, as the Theosophical literature has done. I know of no other book which contains such a wealth of information as The Secret Doctrine. p. 130"