William Walker Atkinson 
Fourteen lessons in yogi philosophy and oriental occultism (translated) [EPUB ebook] 

It is not with ordinary sentiments that we address our students of the Yogi class of 1904. We see, as they may not know, that for many of them this series of lectures will be like a seed planted in fertile soil, which in due time will sprout shoots that will gradually make their way into the sunlight of consciousness, where they will produce leaves, flowers and fruit. Many of the fragments of truth that will be presented to you will not be recognized by you at this time, but in the years to come you will recognize the truth of the impressions conveyed to you in these lessons, and then, and only then, will you make these truths your own.