If you can dream or think it, you can make it come true. The mind is such a beautiful mechanism. I feel if you really look at it the people who changed the world are also the ones who were dreamers. All they did was to make their dreams come true.
Look at H.G. Wells the writer. he wrote a book about going to the moon and within 100 years we landed on it. He also wrote a book about submarines and we have them all over the world now patrolling the waters.
All I can say is that if you want to change the world then dream. Dream the dreams of a deep sleep and maybe just maybe you can become the hero of a new age. I dream of a world where we all get along and become friends. To better man is my dream.