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ing the last few years a more scientific explanation than those usually assigned might be possible. They afforded, if not absolute proof, at least an overwhelming assumption, that living men might actually develop faculties qualified to operate freely on that superior plane of Nature beyond the reach of the physical senses which had been generally supposed accessible only to the spirits of the dead. But all was still shadowy and ill-defined. The story I had to tell revealed a magnificent possibility rather than a definite prospect. It would still, perhaps, have been an interesting story, even if the curtain had gone down upon the situation as I left it when these pages were first put together, but it would have been nothing then, compared to what it has since become.
Now the position in which the subject stands has altogether changed. The tentative communications addressed to me by my Mahatma correspondent in the first instance have paved the way for a long series of still more instructive and valuable letters. Assisted in other ways as well, my comprehension of occult philosophy advanced so far during the two years following the first appearance of this volume, that I was enabled to publish a more important statement, defining the outlines of that teaching, and exhibiting in a connected and intelligible shape the great esoteric theory of human evolution on this earth (and of the cosmogony on which it depends) with which the Adepts deal. The opening which presented itself to me in 1880 proved, in fact, no passing adventure, but the beginning of a new intellectual life. Attracted to it as I was at the time, I