This masterwork by H. P. Blavatsky traces the broad outlines of the Wisdom Religion, and explains its fundamental principles; meeting, at the same time, the various objections raised by the average Western inquirer, and endeavoring to present unfamiliar concepts in a form as simple and in language as clear as possible. That it should succeed in making Theosophy intelligible without mental effort on the part of the reader, would be too much to expect; but it is hoped that the obscurity still left is of the thought and not of the language, is due to depth and not to confusion. To the mentally lazy or obtuse, Theosophy must remain a riddle; for in the world mental as in the world spiritual each man must progress by his own efforts. The writer cannot do the reader's thinking for him, nor would the latter be any the better off if such vicarious thought were possible.