Body language speaks louder than the words you utter and your beliefs affect your body language. If you want to be more persuasive, project a stronger image. If you want to project a stronger image you have to have a strong belief in yourself and what you are saying. Any self-limiting beliefs you have will detract from your belief in yourself and what you are trying to get the prospect to believe. So in order to be more effective at persuading, you need to understand your hidden self-limiting beliefs and work to overcome them, in that way the prospect will get a stronger “pre-sense” of who they are dealing with.