Today is the day you change the world. It is not because you want to, nor is it your duty to do so.
Today, you change the world because you cannot avoid doing so. Anything you do, anywhere you step, what you eat drink, or breathe affects something else in at least some small way. The effect then ripples out, completely involuntarily.
Today as you go about your day, keep this in mind, and try to make the changes you create be changes for the better, even if we don't agree on what better really is.