Your mind works just like computer and there are certain ways to program it. Your belief system consists of different programs. All of your thoughts and feelings are related to your belief-system in subconsciousness. To change your perception of reality, you have to reach your subconsciousness and reprogram your belief system. There are different ways to do that. You can choose Psyh-K method. You can use mantras. You can try my own methods of meditations, that will help you change the belief system in your body and mind. By changing errors in your belief system you will change perception of your reality and the world will change around you.