In his Gettysburg Address, Abraham Lincoln called democracy "government of the people, by the people and for the people." It means that we are not here to serve our government, but that our government is here to serve us - and we have the right to decide who will represent us and how we want to be represented. It means that we have one of the greatest rights any free people can have: the right to vote.
Voting is a right that, throughout history, many have fought for and sacrificed everything to achieve. It's a right that people continue to fight for and that millions of people throughout the world still do not enjoy. As Americans, we have the great privilege to live in a free society and voting is the right that makes us free.