Talk of a “mentor” in combination with “lucid dreaming” sounds rather like he was a fan of Carlos Castaneda’s writing upon the subject. The “mentor” would have come to him while dreaming.
You never fail to give me a new reason to like you.
Thank you for the information. Reminds of the time years ago where some New Age gal said her “spirit guide” brought her into a dream of mine one night. I told her “Don’t EVER go into one of my dreams again!!” (Hey - ya never know!)