In your great wisdom, I do not know how you could have missed it, but perhaps you read the book too quickly. Lucifer and the entity people call Satan (if that is what you mean by the "Devil") are two very different beings. Perhaps the light in you is so strong you have never had to deal with those types of entites coming after you? From my personal experience, I can tell you that there are many like Lucifer, but only one Satan. I suppose you have never had any experiences with them, as some of us lesser beings have, which really says something about your state of evolution because even Yogananda seemed to have a little problem with a certain dark spirit on his trip across the ocean.
As far as what Kirpal Singh may have taught or said when he was in the physical body, and what he knows now, I am sure that when each one of us leaves this life, we will all find there is much more to the universe than we think we know now. There is always more to learn for EVERYBODY, otherwise God would have gotten bored a long time ago and taken his toys home, don't you think?
That is the problem with religions, isn't it? People blindly following and arguing about the things that dead people supposedly said or did, while the universe has continued to evolve? (Or has Sri yukteswar's teaching about the Cycle of the Yugas been discredited by a higher wisdom?)
Oh, and in the list of great spiritual teachers with whom you are in communion, and whose schedules and visits you seem to keep track of, I am sorry that I left Christ Jesus out of that list, because you did include him in your post about Paulsen that set this conversation in motion. Just wanted to set the record straight :)