feel the depth of those words for a second...
let me explain a bit, the way I understand it:
how would you like the world to be? how would you change it? starting from simple, everyday things: I wish people washed their dishes after using them. I wish people didn't smoke so much. I wish streets were cleaner. I wish people were more smiling and positive. continue. start thinking about things you would change.
and when you think it through, with all your heart, what would be right in the world... be that thing. wash the dishes, don't smoke, keep clean, smile and think positive, and anything else, make it personal. be what you want the world to be, right now. and people will see that and be influenced. or even if they don't seem to notice, you will still have changed something for the better, you will feel content (and strong, and right).
also remember that you are (part of) the world.