The lecturer Manly P. Hall was a master in all the aspects of mental/spiritual development. There are many desires, habits and thinking-patterns that seem harmless yet chained us, limiting our true potential. When one is pursuing self-mastery, it is crucial to learn the skills to handle them properly. Putting effort is always the key to self-development since nothing is free. The master occult scholar Manly P. Hall shares his brilliant insight on the subject with this lecture.