The Power of Your Subconscious Mind by Joseph Murphy

The journey from one state of consciousness to another is a psychological one. To enter into your ideal state, apply again what Neville had mentioned. How your body emotionally relates and behaves flows automatically from the mental state you choose by assumption. For example, there was a time where I experienced emotional anxiety before a public speaking. But now I feel genuine emotional excitement before public speaking. This really is magical as stated here in the kabbalah. If the universe is mental in nature, then mental transmutation must be the art of changing the conditions of the universe along the lines of matter, force and mind.