When Dr. Martin Luther King Jr. gave his 'I Have a Dream' speech, he must have known that very few people believed such a vision could come true. Nevertheless, he did not hesitate to stand up and speak. Throughout history, idealists have been willing to commit to dreams that seem impossible. But dreams are more powerful than doubt or violence. When I helped lead the peaceful student protest in Tiananmen Square in 1989, critics said our movement was doomed. The tanks rolled in and many people were killed. I am now in exile. But I know that our hopes for a democratic China will eventually be realized. History allowed Martin Luther King's dream to prevail. China also deserves to dream.