I wrote for the living and not for the dead. Therefore I suited matter and manner to the circumstances of the present day. And although I built upon the foundation laid by the ancients, nevertheless I took large liberties in the erection of the superstructure, based on my personal experience during a quarter-century of practical research into this subject. If the philosophical system which I have presented in The Hidden Teaching Beyond Yoga and The Wisdom of the Overself is regarded as derivative only, it will be regarded wrongly. I have not merely worked out its character from ancient materials alone but also created it from modern ones. For I have gone deep into my own innermost consciousness too. Some of the knowledge found there as well as some learned from contemporaries, has been penned into the words of these books. Thus I have really worked at the emergence of a contemporary philosophic culture.
-- Notebooks Category 12: Reflections > Chapter 3: Encounter With Destiny > # 72