A helpful and ethical PDF on this subject would not pretend to replace the guru. Instead, it would serve as a . A legitimate document from the Kriya Yoga Institute (or similar sources) typically includes:

Before examining the PDF, it is essential to understand the guru. (1907-2002) was a direct disciple of Paramahansa Yogananda (author of Autobiography of a Yogi ) and was considered by many to be a perfected master of Kriya Yoga. He founded the Kriya Yoga Institute and dedicated his life to spreading the sacred technique globally.

A technique to perceive the inner spiritual light by offering the energy of each chakra to the "spiritual eye" between the eyebrows.