Change the world? Here is what you need to know.
You go on trying to change the world, and no matter what you do the world will remain the same because you remain the same. You can get a bigger house, you can get a bigger car, you can get a more beautiful girlfriend/wife or a boyfriend/husband, but nothing will change. The bigger house will not be bigger. The beautiful wife or husband will not be more beautiful. The bigger car will remain the smaller one because you are the same. Your mind, your approach, your ways of seeing are the same. You go on changing things without changing yourself. So only a miserable person leaves a hut and moves to a palace, but the miserable person remains the same. He was miserable in a hut; now he will be miserable in a palace. This misery may be palatial, but he will be miserable.
You go on carrying your misery with you, and wherever you move you will be with yourself. So no outer change is basically a change; it is just an appearance. You simply feel that there has been a change, but there is no change. Only one change, only one revolution, only one mutation can be there, and that is and has always been inside you.
You choose your own emotional state, you are a determinant of all the perception that there is. If your mind changes from negative to the positive then everything will start looking positive. If your outlook is focused on misery, you live in hell; if your outlook is focused on happiness, the very hell becomes the heaven.
"Do not try and bend the spoon, that's impossible, instead only try to realize the truth... there is no spoon. Then you will see that is not the spoon that bends, its only yourself."