求一篇3到5分钟的英语演讲稿，题目是我的幸福观，

There is something in the world. It has no shape, no color and no weight. It can’t be seen or touched. But everyone wants it very much. People try to get it in many ways. Some people think money means it, so they try to make more money; some people believe that knowledge can bring it to them, so they study very hard; some other people find only good health can make themselves get it, so they take part in all kinds of sports and games. Now, you may ask what on earth the mysterious thing is. That’s happiness.