It has been our experience that employing symbols such as the inverted cross, the black goat, or the swastika can result in unexpected and occasionally scary happenings in some circumstances. Active invocation of powers that can be deemed devils, or at the very least forces that society as a whole does not want you to "socialize" with, can result in enormous revelation and energy release. You could be experiencing dreams, dread, the creeps, or even paranormal happenings that are impossible to explain and look entirely unreasonable.
Several people, including one of the writers, have had machinery break down around them as a result of some of the actions detailed in this book (in one case. five brand new tape recorders within a 48-hour period). Some things simply happen: automobiles break down, computers crash, keys vanish, old adversaries resurface, and you confront your boss. This is a low-level manifestation of the "poltergeist phenomenon."
When your silverware begins flying about your room and your keys go missing every morning as a result of this "phenomenon," you know things have gotten out of hand! Aside from the jokes, these are things you'll have to get accustomed to. If you have the guts to go over this point—and bravery and nerve must be developed—you'll find yourself in a whole other universe of sensation and cognition, and you'll be able to deal with the typical world more effectively.
On the negative side, you may grow progressively alienated and disgusted by those around you, and you may find that you have nothing in common with your friends and family. Conversion to the Ultimate Buddha is often followed with a sensation of hatred in several Buddhist teachings (also know as the Gesture of Disgust). In other cases, you may notice that individuals are getting more antagonistic toward you. This is a different component of the job that will need to be handled in a smart and productive manner.
You may also want to read more about Tantra Yoga here.